- 100% Achievements List (64):
(12) Alan Wake's American Nightmare
(50) Alien: Isolation
(50) ARC Raiders
(80) Borderlands GOTY
(75) Borderlands 2
(63) Borderlands: The Pre-Sequel
(81) Borderlands 3
(67) Control Ultimate Edition
(63) DEATH STRANDING DIRECTOR'S CUT
(300) Deep Rock Galactic: Survivor
(49) DiRT Showdown
(22) DLC Quest
(6) Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald: A Whirlwind Heist
(29) Evoland
(84) Fallout 4
(12) FEZ
(10) Firewatch
(37) God of War
(16) Human Resource Machine
(36) Hunt: Showdown 1896
(8) Hunt: Showdown 1896 (Test Server)
(14) INSIDE
(285) Killing Floor
(307) Killing Floor 2
(45) LEGO MARVEL Super Heroes
(70) LEGO MARVEL's Avengers
(60) Life is Strange
(22) Little Inferno
(49) Mad Max
(38) Magic 2014
(48) Metro 2033
(49) Metro: Last Light Redux
(19) Never Alone (Kisima Ingitchuna)
(27) Orcs Must Die!
(27) Orcs Must Die! 2
(31) Outer Wilds
(49) Pacific Drive
(26) Pixel Puzzles: Japan
(51) Portal 2
(28) Portal Stories: Mel
(42) Quantum Break
(50) Remnant: From the Ashes
(65) Remnant II
(18) Rochard
(88) Rocket League
(25) RUSH
(25) Scribblenauts Unlimited
(10) SOMA
(54) Spiral Knights
(5) Storyteller
(35) Tales from the Borderlands
(137) Terraria
(29) The Invincible
(10) The Stanley Parable
(10) The Swapper
(14) The Vanishing of Ethan Carter
(14) The Vanishing of Ethan Carter Redux
(78) The Witcher 3: Wild Hunt
(35) Thomas Was Alone
(53) Tiny and Big: Grandpa's Leftovers
(1) To the Moon
(2) Viscera Cleanup Detail: Shadow Warrior
(20) Wreckfest
(51) Zombie Driver

- 100% but not counted by steam somehow:
(2) The one who pulls out the sword will be crowned king

- Previously 100%, but has since gotten new achievements:
(52/60) DREDGE
(75/77) Grand Theft Auto V
(111/127) Human Fall Flat
(136/149) Risk of Rain 2