All Ingame Achievements, Hardest Difficulty, official, no cheats:

Deus Ex: Human Revolution + DLC . . . 2019-08-05
Devil May Cry 4 . . . . . . . . . . . 2017-01-01
Devil May Cry 4 Special Edition . . . 2023-01-14
Kholat. . . . . . . . . . . . . . . . 2022-12-29
Limbo . . . . . . . . . . . . . . . . 2019-07-03
Mark of the Ninja . . . . . . . . . . 2015-06-27
Portal. . . . . . . . . . . . . . . . 2020-05-10
Resident Evil (HD Remaster) . . . . . 2020-08-24
Resident Evil 7 Demo. . . . . . . . . 2019-07-16
StarCraft2.1 Wings of Liberty . . . . 2011-06-26
StarCraft2.2 Heart of the Swarm . . . 2013-11-21
StarCraft2.3 Legacy of the Void . . . 2019-08-09
StarCraft2.4 Nova Covert Ops. . . . . 2020-12-28
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All Ingame Achievements, Hardest Difficulty, cracked, no cheats:

Devil May Cry 4 . . . . . . . . . . . lost save file
Metroid Fusion. . . . . . . . . . . . 2011-02-06
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All Ingame Achievements, Hardest Difficulty, official, [cheat engine]:

Batman Arkham Asylum. . . . . . . . . 2019-06-12 . . [artificially slowed during extreme challenges]
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Speedrun personal best:
Limbo Normal any% . . . . . . . . . . 0:52:37
Metal Gear Rising Hard any% . . . . . 2:53:XX
Resident Evil 2 1-Shot Demo . . . . . 0:03:01
Resident Evil 3 Racoon City Demo. . . 0:02:02
Resident Evil 7 Demo dirty coin . . . 0:07:32
RE7:BFDLC Bedroom PC. . . . . . . . . 0:06:29
RE7:BFDLC Ethan Must Die PC, KO . . . 0:12:31