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  |created    = [[Update 2.1]]
  |created    = [[Update 2.1]]
  |updated    = [[Update 2.2]]
  |updated    = [[Update 2.2]]
  |difficulty = {{ExtremeDemon}}
  |difficulty = [[File:ExtremeDemon.png|x35px]]
  |stars      = 10
  |stars      = 10
  |length    = 1m 7s (Long)
  |length    = 1m 7s (Long)
  |objects    = 47,986
  |objects    = 47,986
  |copytype  = No password
  |copytype  = No password
  |downloads  = 12.6M
  |downloads  = 10.5M+
  |likes      = 308.8K
  |likes      = 285.3K+
  |rating    = Featured
  |rating    = Featured
  |artist    = [https://dj-nate.newgrounds.com/ dj-Nate]
  |artist    = [https://dj-nate.newgrounds.com/ DJ-Nate]
  |music      = [https://www.newgrounds.com/audio/listen/770520 Thermodynamix]
  |music      = [https://www.newgrounds.com/audio/listen/770520 Thermodynamix]
  |musicid    = 770520
  |musicid    = 770520
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'''Acheron''' is a [[Update 2.1|2.1]] Extreme Demon mega-collaboration level hosted by ryamu and co-hosted by [[Riot]], verified by [[Zoink]] on 23 August 2022 after 72,808 attempts.<ref name=":0">https://www.youtube.com/watch?v=sBKR6aUorzA</ref> It is the second in a trilogy of hell-themed Top 1 levels hosted by Riot and considered a standalone successor to [[Tartarus]], the inspiration for Acheron's 1.9-style decoration. Acheron features dark, greyscale visuals with red accents. The level was initially set to be verified by [[Wolvez]], who reached 96% before dropping it on 7 April 2022. This sparked a competitive verification race in 2022 among players like Zoink, [[Doggie]] and OneAlphaHelix, with Zoink ultimately emerging as the winner.
'''Acheron''' is a [[Update 2.1|2.1]] Extreme Demon mega-collaboration level hosted by ryamu and co-hosted by [[Riot]], verified by [[Zoink]] on 23 August 2022 after 72,808 attempts.<ref name=":0">https://www.youtube.com/watch?v=sBKR6aUorzA</ref> It is the second in a trilogy of hell-themed Top 1 levels hosted by Riot and considered a standalone successor to [[Tartarus]], the inspiration for Acheron's 1.9-style decoration. Acheron features dark, greyscale visuals with red accents. The level was initially set to be verified by [[Wolvez]], who reached 96% before dropping it on 7 April 2022. This sparked a competitive verification race in 2022 among players like Zoink, [[Doggie]] and OneAlphaHelix, with Zoink ultimately emerging as the winner.


Acheron placed at #2 on the [[Demonlist (Pointercrate)|Demonlist]] before being shifted to #1 due to being deemed the hardest level in the game.<ref>https://www.youtube.com/watch?v=K1Sf_CNMamM&t=460</ref><ref>https://www.youtube.com/watch?v=sdKx349OCY0</ref> While many players who completed it found the gameplay unenjoyable,<ref name=":0"/><ref>https://www.youtube.com/watch?v=4ytMwX9B1Ss</ref><ref>https://www.youtube.com/watch?v=V1airJGB4ns</ref> it received praise for its style and synchronization. Acheron is currently the most completed level in the Top 20 of the Demonlist, with over 90 victors.
Acheron placed at #2 on the [[Demonlist (Pointercrate)|Demonlist]] before being shifted to #1 due to being deemed the hardest level in the game.<ref>https://www.youtube.com/watch?v=K1Sf_CNMamM&t=460</ref><ref>https://www.youtube.com/watch?v=sdKx349OCY0</ref> While many players who completed it found the gameplay unenjoyable,<ref name=":0"/><ref>https://www.youtube.com/watch?v=4ytMwX9B1Ss</ref><ref>https://www.youtube.com/watch?v=V1airJGB4ns</ref> it received praise for its style and synchronisation. Acheron is currently the most completed level in the Top 20 of the Demonlist, with over 90 victors.


A third level, [[Aeternus]], was published in [[Update 2.2]] and is set for open verification.
A third level, [[Aeternus]], was published in [[Update 2.2]] and is set for open verification.
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===Wolvez and leaking drama===
===Wolvez and leaking drama===
In September 2021, Wolvez intended to be Acheron's official verifier. Just a GD player asked for a copy to showcase on his channel, and Wolvez agreed. When [[Exen]] also requested a copy, knowing Exen's history of leaking levels, Wolvez and ryamu advised against it. Despite this, Just a GD player gave Exen a copy without permission, which angered the hosts. Tensions between the two parties escalated, leading Just a GD player to threaten to leak Acheron to Vernam unless Wolvez dropped the level. Wolvez, aware of Vernam's reputation, reluctantly complied, passing verification to [[spaceuk]]. Just a GD player apologized, and Wolvez regained verification. Later, ryamu uploaded Acheron to prevent further leaks. He clarified that any verification by someone other than Wolvez would not be official.
In September 2021, Wolvez intended to be Acheron's official verifier. Just a GD player asked for a copy to showcase on his channel, and Wolvez agreed. When [[Exen]] also requested a copy, knowing Exen's history of leaking levels, Wolvez and ryamu advised against it. Despite this, Just a GD player gave Exen a copy without permission, which angered the hosts. Tensions between the two parties escalated, leading Just a GD player to threaten to leak Acheron to Vernam unless Wolvez dropped the level. Wolvez, aware of Vernam's reputation, reluctantly complied, passing verification to [[spaceuk]]. Just a GD player apologised, and Wolvez regained verification. Later, ryamu uploaded Acheron to prevent further leaks. He clarified that any verification by someone other than Wolvez would not be official.


After the drama concluded, Wolvez began progressing on the level, initially getting 38% on 28 October 2021<ref>https://www.youtube.com/watch?v=iKWsWCbNUqY</ref> and 66% a week later.<ref>https://www.youtube.com/watch?v=XDFT6D69DC8</ref> He would soon make more significant progress including 85%,<ref>https://www.youtube.com/watch?v=b8xbASDgmO4</ref> 92%<ref>https://www.youtube.com/watch?v=wAl8CzLb6RA</ref> and finally 96%.<ref>https://www.youtube.com/watch?v=Hjmtt7q5boA</ref> However, on 7 April 2022, Wolvez dropped the verification due to his worsening health condition caused by [[Wikipedia:Anaemia|anaemia]].<ref>https://www.youtube.com/post/UgkxcQ_c1X_BzwSzhYUj4MNsHVUPJtoQ-vy7</ref> As a result, the hosts made the level an open verification.
After the drama concluded, Wolvez began progressing on the level, initially getting 38% on 28 October 2021<ref>https://www.youtube.com/watch?v=iKWsWCbNUqY</ref> and 66% a week later.<ref>https://www.youtube.com/watch?v=XDFT6D69DC8</ref> He would soon make more significant progress including 85%,<ref>https://www.youtube.com/watch?v=b8xbASDgmO4</ref> 92%<ref>https://www.youtube.com/watch?v=wAl8CzLb6RA</ref> and finally 96%.<ref>https://www.youtube.com/watch?v=Hjmtt7q5boA</ref> However, on 7 April 2022, Wolvez dropped the verification due to his worsening health condition caused by [[Wikipedia:Anaemia|anaemia]].<ref>https://www.youtube.com/post/UgkxcQ_c1X_BzwSzhYUj4MNsHVUPJtoQ-vy7</ref> As a result, the hosts made the level an open verification.
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After Zoink got 72% on his version of Acheron, he stated during a stream by the player Arcturus that he had slightly nerfed the level in private. The verified version of Acheron is nerfed compared to the version he got 72% on. spaceuk had been practising the version of the level before the nerfs and deemed that to be harder than [[Slaughterhouse]]. This instance could be why it was not placed at #1 on the Demonlist.
After Zoink got 72% on his version of Acheron, he stated during a stream by the player Arcturus that he had slightly nerfed the level in private. The verified version of Acheron is nerfed compared to the version he got 72% on. spaceuk had been practising the version of the level before the nerfs and deemed that to be harder than [[Slaughterhouse]]. This instance could be why it was not placed at #1 on the Demonlist.


A month after its rating, the level was initially placed at #2 on the Demonlist on 27 September 2022.<ref>https://twitter.com/demonlistgd/status/1574606906668490752</ref> This placement caused controversy, with some criticizing the Demonlist team about a supposed bias despite the emphasis that the placement is highly subject to change. The majority of the criticism blames both Doggie and OneAlphaHelix for their belief that the level should be placed at #2, both of whom have made significant progress on their versions of Acheron.
A month after its rating, the level was initially placed at #2 on the Demonlist on 27 September 2022.<ref>https://twitter.com/demonlistgd/status/1574606906668490752</ref> This placement caused controversy, with some criticising the Demonlist team about a supposed bias despite the emphasis that the placement is highly subject to change. The majority of the criticism blames both Doggie and OneAlphaHelix for their belief that the level should be placed at #2, both of whom have made significant progress on their versions of Acheron.


One possible reason for the uproar is that many in the community believed Zoink's version of the level had never received nerfs, and that the version spaceuk had practised was identical to the version later verified. vulcanium4, a list moderator for the Demonlist, responded to the controversy, saying that the placement is the 'best' that the team could have given.<ref>https://twitter.com/vulcanium4/status/1574698726668570624</ref> The level was later moved to #1 on 7 October 2022.
One possible reason for the uproar is that many in the community believed Zoink's version of the level had never received nerfs, and that the version spaceuk had practised was identical to the version later verified. vulcanium4, a list moderator for the Demonlist, responded to the controversy, saying that the placement is the 'best' that the team could have given.<ref>https://twitter.com/vulcanium4/status/1574698726668570624</ref> The level was later moved to #1 on 7 October 2022.
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==Description==
==Description==
*'''0-9% (ryamu + Riot + icedcave + GrenadeofTacos):''' Acheron begins with an extended triple-spike jump, similar to Tartarus's first jump. After that, the player must perform tricky orb timings and a blue-orb spam. After the spam, the player must precisely jump onto a yellow pad to enter a yellow gravity portal.
*'''0-9% (ryamu + Riot + icedcave + GrenadeofTacos):''' Acheron begins with an extended triple-spike jump, similar to Tartarus' first jump. After that, the player must perform tricky orb timings and a blue-orb spam. After the spam, the player must precisely jump onto a yellow pad to enter a yellow gravity portal.
*'''9-17% (Silver):''' After being tossed by gravity portals, the player hits a blue orb, triggering a precise jump to another blue orb. It leads to a tough memory segment with Clubstep monsters, followed by a blue pad and tricky orb timings. The section ends with a blue orb that sends the player to a pink orb inside a normal-gravity portal.
*'''9-17% (Silver):''' After being tossed by gravity portals, the player hits a blue orb, triggering a precise jump to another blue orb. It leads to a tough memory segment with Clubstep monsters, followed by a blue pad and tricky orb timings. The section ends with a blue orb that sends the player to a pink orb inside a normal-gravity portal.
*'''17-30% (icedcave + Deadlox):''' The drop starts with a brief triple-speed auto-cube segment. The fifth pad launches the player into a tough triple-speed ship section with fake orbs, size and gravity changes. It leads to a hard cube transition and a tight wave section with more size/gravity shifts. Next, a cube section with three tight jumps leads into a precise triple-speed straight-fly that turns anti-gravity midway.
*'''17-30% (icedcave + Deadlox):''' The drop starts with a brief triple-speed auto-cube segment. The fifth pad launches the player into a tough triple-speed ship section with fake orbs, size and gravity changes. It leads to a hard cube transition and a tight wave section with more size/gravity shifts. Next, a cube section with three tight jumps leads into a precise triple-speed straight-fly that turns anti-gravity midway.
*'''30-40% (Deadlox + ryamu + Komp + AzuLer):''' After the straight-fly, the player becomes a mini-cube, and they are forced to perform tight jumps, with one at 31% being among the hardest in the level. Next is a normal-sized UFO section where the player must jump into a blue orb, then spam. After two cube clicks, the player enters a normal-speed wave part that starts in anti-gravity and then switches to normal-gravity midway through.
*'''30-40% (Deadlox + ryamu + Komp + AzuLer):''' After the straight-fly, the player becomes a mini-cube, and they are forced to perform tight jumps, with one at 31% being among the hardest in the level. Next is a normal-sized UFO section where the player must jump into a blue orb, then spam. After two cube clicks, the player enters a normal-speed wave part that starts in anti-gravity and then switches to normal-gravity midway through.
*'''40-49% (ryamu + Ewop):''' The player enters a triple-speed cube portal, then jumps onto a blue pad that leads to a yellow orb timing, launching them into a tough ship segment. In the ship segment, the difficulty consists primarily of ship control and orb timing, as well as a final straight fly similar to Tartarus's 31% ship. Some victors pass this ship part by performing a click pattern synced to the music, such as Zeroxy.<ref>https://www.youtube.com/watch?v=bHG-L8_aOQg&</ref>
*'''40-49% (ryamu + Ewop):''' The player enters a triple-speed cube portal, then jumps onto a blue pad that leads to a yellow orb timing, launching them into a tough ship segment. In the ship segment, the difficulty consists primarily of ship control and orb timing, as well as a final straight fly similar to Tartarus' 31% ship. Some victors pass this ship part by performing a click pattern synced to the music, such as Zeroxy.<ref>https://www.youtube.com/watch?v=bHG-L8_aOQg&</ref>
*'''49-54% (ryamu + Goobfrudla + Ewop):''' The player enters a wave segment that shifts to anti-gravity and mini-size midway. At the end, they return to normal size and must hit a pink orb as they enter a UFO section, where more synced clicks are required.
*'''49-54% (ryamu + Goobfrudla + Ewop):''' The player enters a wave segment that shifts to anti-gravity and mini-size midway. At the end, they return to normal size and must hit a pink orb as they enter a UFO section, where more synced clicks are required.
*'''54-59% (Metalface221):''' The section begins with a double-speed deceleration into a cube portal, where the player falls onto three blue orbs before jumping a few times into a yellow orb. This orb launches them into a brief three-speed ship segment in which the player must fly upward into an anti-gravity portal, then downward. The section concludes with a short, normal-speed mini-cube segment featuring blue orb timings.
*'''54-59% (Metalface221):''' The section begins with a double-speed deceleration into a cube portal, where the player falls onto three blue orbs before jumping a few times into a yellow orb. This orb launches them into a brief three-speed ship segment in which the player must fly upward into an anti-gravity portal, then downward. The section concludes with a short, normal-speed mini-cube segment featuring blue orb timings.
*'''59-66% (Deadlox + Cersia):'''  A blue orb timing sends the player upward into a triple-speed portal, where they now have to perform brief memorization with two blue orbs and a yellow orb. The yellow orb leads to a brief straight-fly, followed by entering a cube portal stacked with a yellow orb. The yellow orb then sends the player to a blue orb, and if they hold after hitting it, they will jump off and face a short blue orb spam part. They then fall into a blue orb, which marks the end of the drop.
*'''59-66% (Deadlox + Cersia):'''  A blue orb timing sends the player upward into a triple-speed portal, where they now have to perform brief memorisation with two blue orbs and a yellow orb. The yellow orb leads to a brief straight-fly, followed by entering a cube portal stacked with a yellow orb. The yellow orb then sends the player to a blue orb, and if they hold after hitting it, they will jump off and face a short blue orb spam part. They then fall into a blue orb, which marks the end of the drop.
*'''66-69% (ryamu + Riot + Deadlox):''' A short bridge leads to the second drop at half-speed, resembling the 60% bridge in Tartarus. It features a tight upward ship corridor followed by challenging wave manoeuvres.
*'''66-69% (ryamu + Riot + Deadlox):''' A short bridge leads to the second drop at half-speed, resembling the 60% bridge in Tartarus. It features a tight upward ship corridor followed by challenging wave manoeuvres.
*'''69-85% (icedcave):''' The second drop accelerates to triple-speed, featuring brief cube timings before a ship section that requires precise straight-flying with orb timings. Next, the player performs a UFO jump into a Clubstep-monster straight-fly, followed by an automatic cube transition to six precise ball timings. The sixth timing leads to a blue pad, sending the player into a double-speed UFO section with jumps into pink orbs inside Clubstep-monsters, demanding tight precision. After three ball timings, the player faces a triple-speed wave and a tight, normal-sized straight-fly.
*'''69-85% (icedcave):''' The second drop accelerates to triple-speed, featuring brief cube timings before a ship section that requires precise straight-flying with orb timings. Next, the player performs a UFO jump into a Clubstep-monster straight-fly, followed by an automatic cube transition to six precise ball timings. The sixth timing leads to a blue pad, sending the player into a double-speed UFO section with jumps into pink orbs inside Clubstep-monsters, demanding tight precision. After three ball timings, the player faces a triple-speed wave and a tight, normal-sized straight-fly.
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**This addition pushed [[Firework]] out of the Top 5, Molten Core into the Extended List, and Solarion into the Legacy List.
**This addition pushed [[Firework]] out of the Top 5, Molten Core into the Extended List, and Solarion into the Legacy List.
**Acheron was later swapped with Slaughterhouse on 7 October 2022, securing the Top 1 spot.
**Acheron was later swapped with Slaughterhouse on 7 October 2022, securing the Top 1 spot.
***Acheron is regarded as the 41st instance of the hardest rated level in the game's history.
***Acheron is regarded as the 39th instance of the hardest rated level in the game's history.
**There has been debate over whether Acheron or Avernus is harder. Avernus was initially ranked below Acheron in April 2023, but it gained a reputation as 'unenjoyable', leading to its rise to #1 in October. However, in February 2024, Avernus's difficulty was challenged, with wPopoff's June 2024 completion causing Avernus to drop, giving it a 'false top 1' label, meaning one level was ranked #1 above another level that was considered easier at the time but was later recognized as harder, creating a situation similar to [[The Golden]]. In December 2024, Avernus was moved back above Acheron, confirming its title as the harder level and dispelling the 'false top 1' notion. Additionally, [[Anathema]] was placed on the Demonlist the same day.
**There has been debate over whether Acheron or Avernus is harder. Avernus was initially ranked below Acheron in April 2023, but it gained a reputation as 'unenjoyable', leading to its rise to #1 in October. However, in February 2024, Avernus' difficulty was challenged, with wPopoff's June 2024 completion causing Avernus to drop, giving it a 'false top 1' label, meaning one level was ranked #1 above another level that was considered easier at the time but was later recognised as harder, creating a situation similar to [[The Golden]]. In December 2024, Avernus was moved back above Acheron, confirming its title as the harder level and dispelling the 'false top 1' notion. Additionally, [[Anathema]] was placed on the Demonlist the same day.
*On 7 October 2023, Acheron became the fourth overall Top 1 level to stay at the top spot for over a year, following [[Bloodbath]], [[Bloodlust]], and Tartarus, and preceding [[Tidal Wave]].
*On 7 October 2023, Acheron became the fourth overall Top 1 level to stay at the top spot for over a year, following [[Bloodbath]], [[Bloodlust]], and Tartarus, and preceding [[Tidal Wave]].
**Acheron, Bloodlust and Tidal Wave are the only Top 1 levels that were not temporarily dethroned.
**Acheron, Bloodlust and Tidal Wave are the only Top 1 levels that were not temporarily dethroned.
*On 12 May 2026, Doggie found out that Acheron had been nerfed sometime after Zoink's verification in two different spots.<ref>https://x.com/DasherDoggie/status/2053975300661252462</ref> This change means that w3rty is actually the first victor of the current rated version of Acheron, as more than 15 players beat it on the unnerfed version.<ref>https://x.com/DasherDoggie/status/2053975302351548571</ref>  
*On 12 May 2026, Doggie found out that Acheron had been nerfed sometime after Zoink's verification in two different spots.
<ref>https://x.com/DasherDoggie/status/2053975300661252462</ref> This change means that w3rty is actually the first victor of the current rated version of Acheron, as more than 15 players beat it on the unnerfed version.<ref>https://x.com/DasherDoggie/status/2053975302351548571</ref>  
*[[Wikipedia:Acheron|Acheron]] (Greek: Αχέροντας) is named after the river located in Epirus, Greece. According to Greek mythology, it is one of the five rivers of the Greek underworld, nicknamed the 'River of Pain'. It serves as the entrance to the underworld.
*[[Wikipedia:Acheron|Acheron]] (Greek: Αχέροντας) is named after the river located in Epirus, Greece. According to Greek mythology, it is one of the five rivers of the Greek underworld, nicknamed the 'River of Pain'. It serves as the entrance to the underworld.
**It is also depicted as a plane of existence in the ''[[Wikipedia:Forgotten Realms|Forgotten Realms]]'' setting for ''[[Wikipedia:Dungeons & Dragons|Dungeons & Dragons (D&D)]]'', making Acheron one of two #1 levels to share a name with a ''D&D'' location along with [[Avernus]].
**It is also depicted as a plane of existence in the ''[[Wikipedia:Forgotten Realms|Forgotten Realms]]'' setting for ''[[Wikipedia:Dungeons & Dragons|Dungeons & Dragons (D&D)]]'', making Acheron one of two #1 levels to share a name with a ''D&D'' location along with [[Avernus]].
*Skipping the triple-speed portal at 17% by jumping over it will result in death by hitting the spike, and the text 'DEEZ NUTZ :v' will pop out.
*Skipping the triple-speed portal at 17% by jumping over it will result in death by hitting the spike, and the text 'DEEZ NUTZ :v' will pop out.
*Failing at the final click reveals an Easter egg where the 'terror' emoji from the Demon List Public Server appears.<ref>https://www.youtube.com/watch?v=b-WA2DKy0j4</ref>
*Acheron shares several similarities to Tartarus aside from their theming:
*Acheron shares several similarities to Tartarus aside from their theming:
**Both levels were open verifications, although Acheron was initially set to be verified by Wolvez.
**Both levels were open verifications, although Acheron was initially set to be verified by Wolvez.
**Both levels sparked controversy after their verification. In Tartarus's case, Dolphy's verification was questioned for its legitimacy, while in Acheron's case, the level's initial placement on the Demonlist sparked controversy, as did the 34% UFO part due to minor changes that made the level impossible.
**Both levels sparked controversy after their verification. In Tartarus' case, Dolphy's verification was questioned for its legitimacy, while in Acheron's case, the level's initial placement on the Demonlist sparked controversy, as did the 34% UFO part due to minor changes that made the level impossible.
**Both levels reigned as #1 for over a year.
**Both levels reigned as #1 for over a year.
**Avernus dethroned Acheron; however, it was moved below Acheron at #4 on 16 June 2024, although when Acheron is no longer #1, similarly to how The Golden temporarily dethroned Tartarus.
**Avernus dethroned Acheron; however, it was moved below Acheron at #4 on 16 June 2024, although when Acheron is no longer #1, similarly to how The Golden temporarily dethroned Tartarus.
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*Riot's version of Acheron cannot be copied.
*Riot's version of Acheron cannot be copied.
*There is an Easter egg where guns can be seen above Acheron, only viewable in the editor.
*There is an Easter egg where guns can be seen above Acheron, only viewable in the editor.
*On 21 July 2025, Llqne achieved a world record of 50% at vanilla 60FPS on Acheron.<ref>https://www.youtube.com/watch?v=g9tPTVjdnVA</ref> His other runs include 17-67%, 26-72%, and 36-96%.<ref>https://www.youtube.com/watch?v=KNnqBr8YsZI</ref><ref>https://www.youtube.com/watch?v=ALoWrBGPDyw</ref><ref>https://www.youtube.com/watch?v=WgcCxGV2QxU</ref>
*On 21 July 2025, Llqne has got a world record of 50% at 60FPS on Acheron,<ref>https://www.youtube.com/watch?v=g9tPTVjdnVA</ref> beating Bradenbowls' previous 25% record achieved on 27 September 2022.<ref>https://www.youtube.com/watch?v=cuSeJYuCSes</ref>
*After Update 2.2, many members of the community openly agreed that the level had been heavily nerfed due to the update's new physics. While most people still agree with it to this day, claiming that 'the ship physics changed' and bringing up the fact that the 2.1 version contains more frame perfects, some find 2.2 Acheron harder than 2.1 Acheron, mentioning how, for example, the 'decreased jump height that was brought with 2.2 made a lot of jumps even harder'.<ref>https://www.reddit.com/r/geometrydash/comments/1qexf9n/why_is_21_acheron_harder_than_22/</ref><ref>https://www.youtube.com/watch?v=uY02IYBTVJs</ref>
*After Update 2.2, many members of the community openly agreed that the level had been heavily nerfed due to the update's new physics. While most people still agree with it to this day, claiming that 'the ship physics changed' and bringing up the fact that the 2.1 version contains more frame perfects, some find 2.2 Acheron harder than 2.1 Acheron, mentioning how, for example, the 'decreased jump height that was brought with 2.2 made a lot of jumps even harder'.<ref>https://www.reddit.com/r/geometrydash/comments/1qexf9n/why_is_21_acheron_harder_than_22/</ref><ref>https://www.youtube.com/watch?v=uY02IYBTVJs</ref>
*Acheron was officially acknowledged by the creator of the game, RobTop, during the Geometry Dash 10-Year Anniversary video for being the most difficult level in the game at the time.
*The placement of [[ORBIT]] on 10 March 2026 pushed Acheron out of the Top 15 of the Demonlist.
*[[Sunix]] initially found Acheron much more fun than Tartarus.<ref>https://www.youtube.com/watch?v=AIERbm3GcI8</ref> However, he sometimes found it tedious because of bad luck and a mental block.<ref>https://www.youtube.com/watch?v=5Epv2IA02xU</ref>
*Acheron was officially acknowledged by the creator of the game, RobTop, during the Geometry Dash 10-Year Anniversary video for being the most difficult level in the game at the time.
**Sunix also beat Acheron on exactly Attempt 1 when he started another round.
***Acheron is also Sunix's first Top 50 Extreme Demon since 2020.
*The placement of [[Green Bullet]] on 26 July 2026 pushed Acheron out of the Top 20 of the Demonlist.


==Videos==
==Videos==
{{VC|sBKR6aUorzA|72KtdTZ4TNw|EfSDmTvr1Gg
{{VC|72KtdTZ4TNw|EfSDmTvr1Gg
  |cpt1 = Verification
  |cpt1 = Old version
|cpt2 = Old version
  |cpt2 = Acheron versions explained
  |cpt3 = Acheron versions explained
}}
}}


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