Like more than one of them
20 games close to two or more of Abyss Odyssey, Garry's Mod and Left 4 Dead 2
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso like Garry's Mod
No More Room in Hell
Left 4 Dead 2, but free to play, and half the hours
Loved · 90%Zombies · SurvivalAlso like Garry's Mod
PEAK
Garry's Mod, but a 3D platformer, and a survival game
Loved · 94%Physics · Online Co-OpAlso like Abyss Odyssey
Content Warning
Garry's Mod, but a horror game, and a tenth of the hours
Loved · 94%Physics · Online Co-OpAlso like Left 4 Dead 2
R.E.P.O.
Garry's Mod, but a survival horror game, and a quarter of the hours
Loved · 96%Physics · ComedyAlso like Left 4 Dead 2
Gunfire Reborn
Abyss Odyssey, but a first-person shooter, and five times the hours
Loved · 93%Action Roguelike · RoguelikeAlso like Garry's Mod
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Paint the Town Red
Abyss Odyssey, but first-person, and twice the hours
Loved · 96%Beat 'em up · FightingAlso like Garry's Mod
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
Zombie Panic! Source
Left 4 Dead 2, but half the hours, and more divisive
Liked · 85%Zombies · FPSAlso like Garry's Mod
Death Road to Canada
Abyss Odyssey, but a survival game, and pixel art
Loved · 93%Action Roguelike · RoguelikeAlso like Left 4 Dead 2
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod
Pratfall
Garry's Mod, but a roguelike, and procedurally generated
Loved · 90%Physics · ComedyAlso like Abyss Odyssey
Call of Duty: World at War
Left 4 Dead 2, but set in World War II
Loved · 92%Zombies · FPSAlso like Garry's Mod
Roboquest
Abyss Odyssey, but a first-person shooter, and faster
Loved · 95%Action Roguelike · RogueliteAlso like Left 4 Dead 2
More like Abyss Odyssey
6 games closest to Abyss Odyssey of your picks
Guacamelee! Gold Edition
Abyss Odyssey, but not a roguelike, and funny
Loved · 93%Metroidvania · Platformer
Rampage Knights
Abyss Odyssey, but co-op, and three times the hours
Loved · 93%Action Roguelike · Beat 'em up
Risk of Rain (2013)
Abyss Odyssey, but harder, and three times the hours
Loved · 93%Action Roguelike · Platformer
Streets of Rogue
Abyss Odyssey, but an immersive sim, and even better loved
Loved · 96%Action Roguelike · Roguelike
More like Garry's Mod
2 games closest to Garry's Mod of your picks
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · Physics
More like Left 4 Dead 2
2 games closest to Left 4 Dead 2 of your picks
Cry of Fear
Left 4 Dead 2, but a psychological horror game, and a third of the hours
Liked · 89%Zombies · Survival Horror
Dead Island Definitive Edition
Left 4 Dead 2, but an action RPG, and open world
Liked · 82%Zombies · Survival
How this list is made
Each game is measured against each of your picks the way a games-like list measures it: the Steam community tags, Steam genres and IGDB themes they share, each counting for more the fewer games carry it. A game's place is how alike it is to your picks together, as a share of each pick's best match, so one alike to two of them comes before one alike to just one. It must be close to at least one of them, as close as it would have to be on that game's own list.
None of your picks is on the list, nor a second release of one, nor a game of their own series. Up to 30 games are shown. Under each name, the kinds it shares with the pick it is closest to, and how it differs from that pick.