Like more than one of them
28 games close to two or more of Cepheus Protocol, Left 4 Dead 2 and Stardew Valley
Project Zomboid
Cepheus Protocol, but with crafting, and four times the hours
Loved · 94%Zombies · Post-apocalypticAlso like Left 4 Dead 2
State of Decay 2
Cepheus Protocol, but co-op, and twice the hours
Liked · 83%Zombies · Post-apocalypticAlso like Left 4 Dead 2
State of Decay: Year-One
Cepheus Protocol, but third-person
Liked · 82%Zombies · Post-apocalypticAlso like Left 4 Dead 2
No One Survived
Cepheus Protocol, but with crafting, and co-op
Divisive · 64%Zombies · Post-apocalypticAlso like Left 4 Dead 2
VEIN
Cepheus Protocol, but co-op, and with crafting
Liked · 87%Zombies · Post-apocalypticAlso 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 Cepheus Protocol
My Time at Portia
Stardew Valley, but single-player
Loved · 91%Farming Sim · Life SimAlso like Cepheus Protocol
Lambda Wars
Cepheus Protocol, but free to play, and sci-fi
Loved · 92%RTS · ZombiesAlso like Left 4 Dead 2
Rust
Cepheus Protocol, but PvP, and 13 times the hours
Liked · 87%Survival · BuildingAlso like Left 4 Dead 2
BLOCKADE 3D
Cepheus Protocol, but a first-person shooter, and pixel art
Divisive · 59%Zombies · BuildingAlso like Left 4 Dead 2
Resident Evil Village
Cepheus Protocol, but a first-person shooter, and horror
Loved · 96%Zombies · Survival HorrorAlso like Left 4 Dead 2
Dead Rising 3
Cepheus Protocol, but a hack and slash game, and funny
Mixed · 77%Zombies · SurvivalAlso like Left 4 Dead 2
Plague Inc: Evolved
Much the same as Cepheus Protocol
Loved · 94%Zombies · Post-apocalypticAlso like Left 4 Dead 2
Zombie Panic! Source
Left 4 Dead 2, but free to play, and half the hours
Liked · 85%Zombies · FPSAlso like Cepheus Protocol
How to Survive
Cepheus Protocol, but an action RPG, and couch co-op
Liked · 83%Zombies · SurvivalAlso like Left 4 Dead 2
My Time at Sandrock
Stardew Valley, but an action RPG
Liked · 88%Farming Sim · Life SimAlso like Cepheus Protocol
World War Z
Left 4 Dead 2, but more divisive
Liked · 82%Zombies · Online Co-OpAlso like Cepheus Protocol
The Long Dark
Cepheus Protocol, but first-person, and three times the hours
Liked · 89%Survival · Post-apocalypticAlso like Left 4 Dead 2
Resident Evil 2
Cepheus Protocol, but a third-person shooter, and full of puzzles
Loved · 97%Zombies · SurvivalAlso like Left 4 Dead 2
Don't Starve Together
Cepheus Protocol, but three times the hours, and even better loved
Loved · 95%Survival · SandboxAlso like Left 4 Dead 2
Dead Rising 2: Off the Record
Cepheus Protocol, but a hack and slash game, and third-person
Mixed · 77%Zombies · SandboxAlso like Left 4 Dead 2
More like Cepheus Protocol
2 games closest to Cepheus Protocol of your picks
Fallout Shelter
Cepheus Protocol, but free to play, and a colony sim
Liked · 88%Post-apocalyptic · 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.