Single-player games like Zombie Protocol
Below are 10 single-player Steam games similar to Zombie Protocol, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Zombie Protocol page.
Ranked picks
- 1

Left 4 Dead 2
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action with Zombie Protocol.
Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
- 2

The Last of Us™ Part I
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action with Zombie Protocol.
Discover the award-winning game that inspired the critically acclaimed television show. Guide Joel and Ellie through a post-apocalyptic America, and encounter unforgettable allies and enemies in The Last of Us™.
- 3

Delivery from the Pain:Survival / 末日方舟:生存
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action with Zombie Protocol.
You'll play as a survivor in a world overrun by zombies. Explore and interact with other survivors, making tough choices about whether to help or exploit them. Defend against zombies, collect resources, craft, and fortify your shelter. Use strategy to escape this world and return to safety.
- 4

The Walking Dead: Saints & Sinners
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action with Zombie Protocol.
Saints & Sinners is a game unlike any other in The Walking Dead universe. Every challenge you face and decision you make is driven by YOU. Fight the undead, scavenge through the flooded ruins of New Orleans, and face gut-wrenching choices for you and the other survivors. Live The Walking Dead.
- 5

S.T.A.L.K.E.R.: Call of Pripyat
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action and RPG with Zombie Protocol.
S.T.A.L.K.E.R.: Call of Pripyat is the direct sequel of the S.T.A.L.K.E.R.: Shadow of Chernobyl. As a Major Alexander Degtyarev you should investigate the crash of the governmental helicopters around the Zone and find out, what happened there.
- 6

Nether: Resurrected
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action and Simulation with Zombie Protocol.
Nether is a unique, first-person, multiplayer urban survival experience. Set in a post-apocalyptic world, Nether forces players to make life-saving decisions in a fast-paced struggle against players and the environment. Join tribes, hold territory, scavenge, craft, trade and loot your way to stay alive.
- 7

State of Decay
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action and Simulation with Zombie Protocol.
The end is here. Life as you knew it has gone to hell after the mother of all zombie outbreaks. Now you and the few scattered survivors must band together to survive and rebuild in a 3rd-person action game set in a dynamic open world.
- 8

The Walking Dead Onslaught
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action and Simulation with Zombie Protocol.
There’s no rest when survival is on the line. Step into AMC’s The Walking Dead and prepare for an onslaught of walkers as you assume the roles of your favorite characters from the show, and confront the horrors and humanity of this apocalyptic new world.
- 9

No Mercy, No Sanctuary
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required. Shares Action and Simulation with Zombie Protocol.
Survive a gritty 2D apocalypse featuring realistic physics and visceral dismemberment. Fortify your sanctuary by day and defend it by night. Scrutinize every survivor seeking refuge: inspect them for symptoms, for one hidden infection will doom your entire colony.
- 10

TIC.EXE
Single-player alternative to Zombie Protocol — playable solo, no multiplayer required.
Three in a row is not a win — it is a discharge. A tactical grid roguelite: fight hostile processes on a shifting board, build an engine out of 30 modules, and clear eight sectors before the machine answers its own launch request.