I am an Achievement Hunter here is a list of the 129 games I currently have completed:

12 is Better Than 6
12 Labours of Hercules
12 Labours of Hercules II: The Cretan Bull
12 Labours of Hercules III: Girl Power
12 Labours of Hercules IV: Mother Nature
12 Labours of Hercules V: Kids of Hellas
ABZU
A Date In The Park
Airstrike HD
Among the Sleep
Antenna
Betrayer
Black Mesa
Blood Feed
Bloody Walls
Borderlands 2
Borderlands 3
Brink
Call of Juarez: Gunslinger
Carnivores: Dinosaur Hunter Reborn
Catch a Falling Star
Clicker Heroes
Counter-Strike: Global Offensive
Counter Strike Source
Dead Effect
Death in the Water
Death in the Water 2
Death Rally
Depth Hunter 2: Deep Dive
Devolverland Expo
Dinosaur Forest
Dinosaur Hunt
Doom 3 BFG Edition
Doom 64
Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald: A Whirlwind Heist
Drop Alive
Duke Nukem 3D: Megaton Edition
Duke Nukem Forever
Dungeon Creepster
Emily is Away
FEMINAZI: The Triggering
Fine Sweeper
Freebie
Germ Wars
God Mode
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
Hentai Sniper
Hentai vs Virus
Hexcells
Hexcells Infinite
Hexcells Plus
High Hell
Hyper Color Ball
I, Zombie
Iron Snout
Jellyfish
Jellyfish Season
Kholat
Lexica
Life Beetle
Lines Infinite
Lines X
Lins X Free
Loading screen Simulator
Lust From Beyond: Scarlet
LYNE
Mahjong
Mandagon
Masked Shooters 2
Missing Translation
Monument
Morphopolis
Mushroom Cats
Ninja Stealth
Oik
Oik 2
Oik 3
Oik Memory
Pain Train
Phantom Soldier
Polygoneer
Putrefaction
Putrefaction 2: Void Walker
Qop
Rage
Raptor: Call Of The Shadows - 2015 Edition
Russion Horror Story
Samorost 3
Scorn
Shadow Warrior
Shadow Warrior 2
Shadow Warrior Classic Redux
Sisyphus Reborn
Slash It
Sniper Elite V.2
Sniper Ghost Warrior
Sniper Ghost Warrior 2
Spec Ops: The Line
Sprout
Summer Sale
Survival Zombies the Inverted Evolution
Taiku Mansion
The Albino Hunter
The Average Everday Adventures of Samantha Browne
The Bottom Of The Well
The Culling Of The Cows
The Dweller
The Plan
The Tower Of Elements
Tiny Tina's Assault on Dragon Keep: A Wonderlands One-shot Adventure
Transmissions: Element 120
Turbo Pug 3D
Turn Around
Turok
Turok 2 Seeds of Evil
Under Zero
Unloved
Viscera Cleanup Detail: Santa's Rampage
Viscera Cleanup Detail: Shadow Warrior
Waking Mars
Wolfenstein: The New Order
Wolfenstein: The Old Blood
Woodle Tree Adventures
Zombie Army Trilogy
Zup!
Zup! 2
Zup! 3
Zup! 4
Zup! 5
Zup! 6
Zup! 7
Zup! 8
Zup! 9
Zup! S
Zup! X
Zup! Xs
Zup! Zero