Like more than one of them
29 games close to two or more of Alien Shooter, 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
Alien Swarm
Alien Shooter, but free to play, and co-op
Loved · 95%Aliens · Top-Down ShooterAlso like Left 4 Dead 2
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
Borderlands GOTY
Alien Shooter, but loot-driven, and nine times the hours
Loved · 90%Looter Shooter · ShooterAlso like Garry's Mod and Left 4 Dead 2
SAS: Zombie Assault 4
Alien Shooter, but with zombies, and three times the hours
Liked · 86%Top-Down Shooter · Top-DownAlso like Left 4 Dead 2
Evolve Stage 2
Left 4 Dead 2, but free to play, and sci-fi
Mixed · 70%FPS · Team-BasedAlso like Garry's Mod and Alien Shooter
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod
Serious Sam HD: The First Encounter
Garry's Mod, but a boomer shooter, and a tenth of the hours
Loved · 93%FPS · ComedyAlso like Alien Shooter and Left 4 Dead 2
Borderlands 2
Alien Shooter, but loot-driven, and 13 times the hours
Loved · 90%Looter Shooter · ShooterAlso like Garry's Mod
Splitgate
Garry's Mod, but free to play, and an arena shooter
Loved · 91%FPS · PhysicsAlso like Left 4 Dead 2
Aliens vs. Predator
Alien Shooter, but stealthy, and three times the hours
Loved · 91%Aliens · ShooterAlso like Left 4 Dead 2
Halo: The Master Chief Collection
Alien Shooter, but story-rich, and five times the hours
Loved · 92%Aliens · ShooterAlso like Garry's Mod and Left 4 Dead 2
Aliens: Fireteam Elite
Alien Shooter, but co-op, and more divisive
Liked · 80%Aliens · ShooterAlso like Left 4 Dead 2
Serious Sam 3: BFE
Garry's Mod, but a boomer shooter, and a tenth of the hours
Liked · 88%FPS · ComedyAlso like Alien Shooter and Left 4 Dead 2
Counter-Strike Nexon
Left 4 Dead 2, but PvP, and more divisive
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Half-Life 2
Alien Shooter, but first-person, and four times the hours
Loved · 98%Aliens · ShooterAlso like Garry's Mod and Left 4 Dead 2
STAR WARS Battlefront II
Alien Shooter, but in space, and four times the hours
Liked · 88%Shooter · AliensAlso like Garry's Mod and Left 4 Dead 2
Gunfire Reborn
Alien Shooter, but an action roguelike, and eight times the hours
Loved · 93%Looter Shooter · ShooterAlso like Garry's Mod
BrainBread 2
Alien Shooter, but free to play, and a survival game
Mixed · 73%Shooter · HorrorAlso like Left 4 Dead 2
Ravenfield
Garry's Mod, but single-player, and a third of the hours
Loved · 97%Sandbox · FPSAlso like Left 4 Dead 2
Yet Another Zombie Defense
Alien Shooter, but a tower defense game, and about survival
Liked · 87%Top-Down · ShooterAlso like Left 4 Dead 2
Space Hulk: Deathwing
Alien Shooter, but co-op, and more divisive
Divisive · 55%Aliens · ShooterAlso like Left 4 Dead 2 and Garry's Mod
Fallout 3 - Game of the Year Edition
Garry's Mod, but an action RPG, and a quarter of the hours
Liked · 82%Sandbox · FPSAlso like Left 4 Dead 2
More like Left 4 Dead 2
1 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
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.