Like more than one of them
30 games close to two or more of Ultimate Zombie Defense, Garry's Mod and Left 4 Dead 2
Killing Floor 2
Much the same as Left 4 Dead 2
Liked · 88%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
Killing Floor
Much the same as Left 4 Dead 2
Loved · 95%Zombies · FPSAlso like Ultimate Zombie Defense and 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 Ultimate Zombie Defense and Garry's Mod
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso like Ultimate Zombie Defense and Garry's Mod
Zombie Panic! Source
Left 4 Dead 2, but free to play, and more divisive
Liked · 85%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
Yet Another Zombie Defense
Ultimate Zombie Defense, but half the hours
Liked · 87%Zombies · Tower DefenseAlso like Left 4 Dead 2
Dead Island Definitive Edition
Left 4 Dead 2, but an action RPG, and open world
Liked · 82%Zombies · SurvivalAlso like Ultimate Zombie Defense
Counter-Strike Nexon
Left 4 Dead 2, but PvP, and more divisive
Mixed · 67%Zombies · FPSAlso like Garry's Mod and Ultimate Zombie Defense
State of Decay 2
Ultimate Zombie Defense, but open world, and five times the hours
Liked · 83%Zombies · SurvivalAlso like Left 4 Dead 2
SAS: Zombie Assault 4
Ultimate Zombie Defense, but 2D, and twice the hours
Liked · 86%Zombies · Top-Down ShooterAlso like Left 4 Dead 2
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · PhysicsAlso like Ultimate Zombie Defense
World War Z
Left 4 Dead 2, but more divisive
Liked · 82%Zombies · Online Co-OpAlso like Ultimate Zombie Defense and Garry's Mod
Pavlov VR
Left 4 Dead 2, but in VR, and military
Liked · 88%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
7 Days to Die
Ultimate Zombie Defense, but a survival crafting game, and 17 times the hours
Liked · 87%Zombies · Tower DefenseAlso like Garry's Mod and Left 4 Dead 2
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Ultimate Zombie Defense and Garry's Mod
Call of Duty: World at War
Left 4 Dead 2, but set in World War II
Loved · 92%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
Propagation VR
Left 4 Dead 2, but in VR, and a tenth of the hours
Loved · 94%Zombies · FPSAlso like Ultimate Zombie Defense
Evolve Stage 2
Left 4 Dead 2, but sci-fi
Mixed · 70%FPS · Team-BasedAlso like Ultimate Zombie Defense and Garry's Mod
Sker Ritual
Ultimate Zombie Defense, but story-rich
Liked · 81%Zombies · Co-opAlso like Left 4 Dead 2 and Garry's Mod
Codename CURE
Left 4 Dead 2, but military, and a tenth of the hours
Liked · 85%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
Call of Duty: Black Ops II
Left 4 Dead 2, but a quarter of the hours
Liked · 86%FPS · Team-BasedAlso like Ultimate Zombie Defense and Garry's Mod
Dying Light
Left 4 Dead 2, but with parkour, and open world
Loved · 95%Zombies · Survival HorrorAlso like Ultimate Zombie Defense
Arizona Sunshine VR Legacy
Ultimate Zombie Defense, but in VR, and co-op
Mixed · 79%Zombies · Online Co-OpAlso like Left 4 Dead 2
Synergy
Left 4 Dead 2, but sci-fi, and a third of the hours
Liked · 89%Zombies · FPSAlso like Ultimate Zombie Defense and Garry's Mod
Depth
Left 4 Dead 2, but underwater, and half the hours
Liked · 88%Team-Based · ShooterAlso like Ultimate Zombie Defense and Garry's Mod
No More Room in Hell 2
Ultimate Zombie Defense, but first-person, and more divisive
Divisive · 57%Zombies · Online Co-OpAlso 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
Dead Rising 2: Off the Record
Ultimate Zombie Defense, but a hack and slash game, and three times the hours
Mixed · 77%Zombies · Online Co-OpAlso like Left 4 Dead 2 and Garry's Mod
WARMODE
Ultimate Zombie Defense, but free to play, and an MMO
Divisive · 62%Zombies · Online Co-OpAlso like Left 4 Dead 2 and Garry's Mod
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.