Like more than one of them
19 games close to two or more of Nova Roma, Left 4 Dead 2 and Garry's Mod
Scrap Mechanic
Garry's Mod, but a survival crafting game, and with base building
Loved · 92%Building · PhysicsAlso like Nova Roma
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
SCP: Secret Laboratory
Left 4 Dead 2, but free to play
Loved · 91%FPS · Survival HorrorAlso 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
Counter-Strike Nexon
Left 4 Dead 2, but free to play, and PvP
Mixed · 67%Zombies · FPSAlso like Garry's Mod
Unturned
Left 4 Dead 2, but a survival crafting game
Loved · 91%Zombies · SurvivalAlso like Garry's Mod
7 Days to Die
Garry's Mod, but a base builder, and about survival
Liked · 87%Building · SandboxAlso like Left 4 Dead 2
Blockland
Garry's Mod, but open world, and a quarter of the hours
Mixed · 74%Building · SandboxAlso like Left 4 Dead 2
Call of Duty: World at War
Left 4 Dead 2, but set in World War II
Loved · 92%Zombies · FPSAlso like Garry's Mod
Sons Of The Forest
Garry's Mod, but a survival horror game, and with crafting
Liked · 88%Building · SandboxAlso 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
Totally Accurate Battlegrounds
Garry's Mod, but free to play, and a battle royale
Liked · 88%Physics · SandboxAlso like Left 4 Dead 2
Subsistence
Garry's Mod, but a base builder, and half the hours
Mixed · 72%Building · SandboxAlso like Left 4 Dead 2
Green Hell
Garry's Mod, but about survival, and a third of the hours
Liked · 85%Online Co-Op · SandboxAlso like Left 4 Dead 2
More like Nova Roma
4 games closest to Nova Roma of your picks
Against the Storm
Nova Roma, but a roguelite, and four times the hours
Loved · 94%Grand Strategy · City Builder
Workers & Resources: Soviet Republic
Nova Roma, but five times the hours
Loved · 91%Grand Strategy · City Builder
Empires of the Undergrowth
Nova Roma, but a real-time strategy game, and three times the hours
Loved · 94%Grand Strategy · City Builder
More like Left 4 Dead 2
2 games closest to Left 4 Dead 2 of your picks
Project Zomboid
Left 4 Dead 2, but a survival crafting game, and twice the hours
Loved · 94%Zombies · Survival
More like Garry's Mod
5 games closest to Garry's Mod of your picks
Fireworks Mania - An Explosive Simulator
Garry's Mod, but a hobby sim, and a tenth of the hours
Loved · 97%Sandbox · Physics
Hot Dogs, Horseshoes & Hand Grenades
Garry's Mod, but in VR, and single-player
Loved · 97%Physics · Sandbox
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.