DOOM 2016:

Nightmare, Ultra-Nightmare, 100% achievements and all slayer ranks on UN arcade levels. 1.58 KD in multiplayer.

DOOM Eternal:

Nightmare, Ultra-Nightmare, 100% achievements, plus: Taras Nabad, Super Gore Nest, Mars Core, and World Spear Master levels all on Ultra-Nightmare, Ancient Gods 1 & 2 on Ultra-Nightmare, and ARC Complex and Cultist Base MLs on Nightmare extra life mode without dying/losing an extra life or loading a checkpoint. Additionally, Horde Mode on Nightmare without losing an extra life. Achieved slayer rating. Had 38 extra lives at the end.

Wolfenstein: The New Order:

Uber, Iron Man, and 100% achievements.

Wolfenstein: The Old Blood:

Uber, Mein Leben, and 100% achievements.

Wolfenstein II: The New Colossus:

I am Death Incarnate (campaign + Agent Silent Death, Captain Wilkins, Gunslinger Joe), Mein Leben (campaign + Agent Silent Death, Captain Wilkins, Gunslinger Joe) & 100% achievements.

Prey:

Nightmare (campaign)

Terraria:

100% achievements, master mode zenith seed.

Quake:

The following all on nightmare (and 100% achievements): Main game, Scourge of Armagon, Dissolution of Eternity, Dimension of the Past, and Dimension of the Machine. Honey on Hard, as nightmare wasn't available.

Quake II:

Main campaign + Ground Zero and The Reckoning on Nightmare using YAMAGI Quake II build. Also did Nightmare in Quake II RTX.

Quake 4:

Campaign on General.

METAL GEAR RISING: REVENGEANCE:

S ranks in everything on Revengeance (including Sam and Wolf DLCs), 100% achievements.

ULTRAKILL:

P ranks in everything from prelude through P-2 on Violent. Also 100% secrets. Best CG wave is 51 AHAHAHA!!!!.

The Binding of Isaac: Wrath of the Lamb: Eternal Edition:

100% achievements.

The Binding of Isaac: Repentance:

100% achievements.

Half-Life games & mods done on hard difficulty:

Half-Life (also done on phone LMAO)
Half-Life: Source
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
Half-Life 2: Lost Coast
Black Mesa (Mod + improved Xen)
Black Mesa (improven Xen & final Xen)
Cosmonaut
Resistance Element
Entropy Zero
Entropy Zero Two
MINERVA Metastasis
Arctic Adventures: Episodes
USS Darkstar
Half-Life: Echoes
Half-Life: Uplink
Half-Life: Cthulhu
Prospekt

Other Half-Life stuff:

Half-Life Decay (solo & co-op)

DOOM 3:

Main campaign + Resurrection of Evil, The Lost Mission, and Conscientious Objector mod on Nightmare.

Borderlands:

100% achievements, Crawmerax defeated at level 69 Brick.

Borderlands 2:

100% achievements, all raid bosses + peak and all campaigns (DLCs included) (OP 10) defeated as level 80 OP 10 Krieg. They are as follows (♥♥♥♥ them):

Terramorphous
Voracidous
Hyperius
Ancient Dragons of Destruction
Haderax
Dexiduous
Son of Crawmerax (Raid version)
Pyro Pete (Raid version)
Vermivorous
Master Gee

Borderlands: The Pre-Sequel:

Level 70 Invincible Sentinel & EOS defeated.

Undertale:

True Pacifist, Neutral, and Genocide all complete. Sans defeated in game, and in bad time simulator. (A LOT in bad time simulator).

BioShock: Hard mode complete

BioShock 2: Hard mode complete

BioShock Infinite: 1999 mode complete for main campaign & both DLCs

Call of Duty: Infinite Warfare: Veteran campaign complete

Call of Duty: Modern Warfare II: Campaign complete on Realism