Editing SrGuillester (section)

===Late career===
On 10 January 2017, SrGuillester completed Red World Rebirth.<ref>https://www.youtube.com/watch?v=2j6ibsOsNng</ref> On 18 January, he made a preview of the level Cimmerian Shade.<ref>https://www.youtube.com/watch?v=nrotwlzauWM</ref> Six days following the preview, he achieved 78% on [[A Bizarre Phantasm]].<ref>https://www.youtube.com/watch?v=rPYcyomEOis</ref> On 4 February, SrGuillester beat [[Conical Depression]].<ref>https://www.youtube.com/watch?v=sNd_3I2iu4Y</ref> Three days later, he showcased the full layout of Cimmerian Shade.<ref>https://www.youtube.com/watch?v=LAgqD3qTSsw</ref> On 11 February, he beat [[Cataclysm]],<ref>https://www.youtube.com/watch?v=us18wOBAX60</ref> and then DoomsDay, a level that used to be a Top 50 Demon but was removed from the Demonlist on 24 February due to a hacking scandal.<ref>https://www.youtube.com/watch?v=uHqypy5ecDY</ref>

On 7 March, SrGuillester completed the memory Demon Mental Torture,<ref>https://www.youtube.com/watch?v=A9foZyVT9gU</ref> and two weeks later, Flat Major.<ref>https://www.youtube.com/watch?v=W3PUay1Wo64</ref> On 23 April, he beat The JanuS Miracle.<ref>https://www.youtube.com/watch?v=m5fnJinig-U</ref>

On 3 May, SrGuillester beat his new hardest Demon, [[Bloodbath]].<ref>https://www.youtube.com/watch?v=j6U4eA-aInw</ref> Four days later, he completed [[A Bizarre Phantasm]] and Breakout.<ref>https://www.youtube.com/watch?v=TaQLM3z4PDg</ref><ref>https://www.youtube.com/watch?v=gGvkCngHepc</ref> On 15 May, he achieved 80% on AfterCataBath,<ref>https://www.youtube.com/watch?v=sWuhRm1DFYc</ref> two days later completed [[aftermath]],<ref>https://www.youtube.com/watch?v=p-78KT0k4_A</ref> and on May 19, he completed Novalis.<ref>https://www.youtube.com/watch?v=iNf3IcnGY_8</ref> On 22 May, he got a new hardest Demon again, [[Black Blizzard]], becoming the first victor.<ref>https://www.youtube.com/watch?v=qW13m8Hm5M4</ref> On 24 May, he beat the original version of End of the World.<ref>https://www.youtube.com/watch?v=zsKVLC10GJI</ref> Finally, on 26 May, he verified Volare.<ref>https://www.youtube.com/watch?v=imGdaL3jQ2M</ref>

On 5 June, SrGuillester previewed Happy End,<ref>https://www.youtube.com/watch?v=wYmir2cVekQ</ref> and on 10 June, he achieved 94% on Superex's nerfed copy of [[Silent Club]].<ref>https://www.youtube.com/watch?v=ee5SxBvpYSw</ref> The next day on 11 June, he completed Superex's Silent Club,<ref>https://www.youtube.com/watch?v=Xp5mlIpa59E</ref> and just two days afterward, he completed the Team N2 level [[Artificial Ideology]].<ref>https://www.youtube.com/watch?v=rgmhcWTug1g</ref> However, later he would be inactive.

In July, SrGuillester returned and beat several Extreme Demons including Heartbeat<ref>https://www.youtube.com/watch?v=zHDWkqCSbF0</ref> and verified The Antimatter.<ref>https://www.youtube.com/watch?v=88ZOPNAVOyA</ref> Then on 24 July, he verified Carnage Mode, said to be one of the best Demons along with Allegiance, [[Artificial Ascent]], and [[Digital Descent]].<ref>https://www.youtube.com/watch?v=5Dy2fccB9Co</ref>

On 2 August, SrGuillester completed Betrayal of Fate.<ref>https://www.youtube.com/watch?v=Bb2fS-bUVzQ</ref><ref>https://www.youtube.com/watch?v=_V8tbxBDjoM</ref> He then started beating KrmaL's Demons, hi and Rearmed.<ref>https://www.youtube.com/watch?v=U5Qvez-nwjQ</ref><ref>https://www.youtube.com/watch?v=8e5J0QAL_WA</ref> Afterwards, on 31 August, he completed Totally Legit Level.<ref>https://www.youtube.com/watch?v=K6U_bozgSSY</ref>

In September, he completed the [[Killbot]] layout, beat Game Over, Deadly Corridor, and Angelic Blood.

October: Besides beating various [[Nine Circles Levels|Nine Circles Demon levels]], SrGuillester beat random Demons. He made a video on his layouts.

November: He started doing long ten-minute videos on levels such as Retention. He also reached 1,000 Demons.

December: He got 45% on Unnerfed Silent Club and later a 44-100% run on the level. He made a video called "SrGuillester Rewind 2017".

====2018-present career====
Currently, his best month is January 2018. He beat Voksius, WcropoliX, Audio Extraction, Hate War, Trapezoid Happiness, Invisible Deadlocked, 8o X, Temple of Destiny, [[Phobos]], [[Infernal Abyss]] and [[Deception Dive]].

February: He started a 'Don't play this level' series, in which he gets a bad fail at what he thinks is a bad Demon. The first 'bad' level was [[Quantum Processing]], which he beat later. He got 99% and 100% on [[Yatagarasu]], which was now his hardest Demon. He beat Plasma Pulse III and Photovoltaic, and also 'bad' Demon [[Athanatos]]. He also beat the once-impossible level, The Big Black, after nerfing it.

March: SrGuillester ousted himself again by completing a new hardest Demon: [[Erebus]]. He previewed a level more than a year old: Cimmerian Shade, looking as imposing as ever. AzuLer4 was once again to decorate the level, as he had decorated the majority of serious SrGuillester levels. SrGuillester previewed a new level called Distortion, which has quirky and odd gameplay. Later in the month, he beat Cosmorush 21.

April: On April Fools' Day, SrGuillester uploaded the layout of a sequel to Hatred called Deathwish. Interestingly, the soundtrack is Carnage, the same one as that of Carnage Mode, the level SrGuillester verified a few months before. He completed the trending Hard Demon Future Funk. On April 14, he picked up Delta Interface, a level made by [[Platnuu]], who is known for his upcoming Extreme Demon Orochi.

May: SrGuillester started beating various Insane Demons as he wanted to beat all levels of that difficulty. The Insane Demons include Catastrophic and Quantumwave.

June: SrGuillester beat a lot of Insane Demon such as Pulsar, SourCream 2, Castle of Redemption, 10, and Decimation. He wanted to continue his goal of beating all Insane Demons in GD. He did not beat any Extremes in June.

July: SrGuillester continued his Insane Demons grind. He also verified a level called Step Aside. He used GuitarHeroStyles' icon to beat Phobos, mostly to mock him.

August: SrGuillester mostly beat Insane Demons during August. He also verified a remake of a level called End of the world, originally made by DemonClown and verified by Luqualizer. On top of this, he beat the former impossible level called Deathsgate, a hacked level by Aurorus. And the next day he would beat AAAAAAAAAAAAAAAAAAAA.

September: He beat a lot of Extreme and Insane Demons such as Frizzantino Vibes, Artificial Dream, Glowy, Es Dilar Nos, The Hell Dignity, [[Idols]], [[Blade of Justice]], [[Sakupen Hell]], and Excessive Compliment. He also claimed to have beaten ATMarbl off cam. Then he beat Silentium Gradas. At the end of September, he made a compilation of his fails on Extreme Demons.

October: He started the month with Spectral Tentation. He also beat Incipient during this month. He also started a new series called challengester.

November: He beat The Big Black by Zylenox. Then he gave a final preview of his mega-collaboration Ocular Miracle.

December: He beat Another Cataclysm using the secret way.

January 2019: He made swift progress on God Eater by knobbelboy but then gave up after getting 93%. He also previewed a level called M-A.

On 11 December 2020, he got 76% on [[Crimson Planet]]; on 16 February 2021, completed Freedom08; on 14 April 2021, verified [[Nhelv]]; on 9 August 2021, beat AfterCataBath.

SrGuillester beat [[Crimson Planet]] on 16 November 2021, making it his hardest completion at the time. He then beat [[Cold Sweat]] on 31 October 2023, marking another new hardest. On 22 April 2026, he beat [[Zodiac]], making it his current hardest completion.<ref>https://www.youtube.com/watch?v=dULdFb-QNOE</ref>