Single-player games like Cepheus Protocol
Below are 10 single-player Steam games similar to Cepheus 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 Cepheus Protocol page.
Ranked picks
- 1
VEIN
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Simulation with Cepheus Protocol.
VEIN is a post-apocalyptic survival multiplayer sandbox game. Gather supplies to survive, explore abandoned buildings, defend your home, and rebuild society, whether alone or with friends.
- 2
Survive the Nights
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
Hardcore open-world survival where preparation is everything. Scavenge, craft, fortify during the day. When night falls, the infected hunt in numbers. Play solo or with friends in a brutal post-apocalyptic sandbox where survival is earned through smart decisions. How many Nights will you survive?
- 3
DeadPoly
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
DeadPoly is a polygon arcade zombie survival looter shooter with base building, crafting, scavenging, leveling, questing, and more, but your only goal is survival, everything else is optional.
- 4
Survivalist
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Strategy with Cepheus Protocol.
It's one year after the collapse of civilization and self-centered hedge fund manager Joe Wheeler emerges from his specially constructed bunker in search of food. This is a huge open-world RPG where you have the freedom to play how you want - but your choices have consequences.
- 5
Clanfolk
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Strategy and Simulation with Cepheus Protocol.
Clanfolk is a colony sim set in the Scottish Highlands. Harness your environment to survive - fish, gather, hunt, and farm as you prepare for the winter. Build an inn, trade with other clans, have children and marry them off - live life and prosper across the generations.
- 6
Survival Machine
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
Build your base on a moving Machine, travel through biomes with different resources, and prepare for the night when a zombie threat is much higher than during the day. Would you go solo or explore this new world with your best friends?
- 7
PolyZ
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
Imagine DayZ mixed with Escape From Tarkov, but in Low Poly. A persistent world survival game featuring PvP, PvE, crafting, base-building, and zombies infected with a contagious virus.
- 8
Green Hell
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
Plunge into the open-world survival simulation set in the extreme conditions of the uncharted Amazon jungle. Use real-life survival techniques to craft, hunt, fight, and gather resources, set a makeshift shelter, or raise a fortress. Survive alone or team up with your friends and challenge the jungle together.
- 9
Legacy
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Strategy with Cepheus Protocol.
Legacy is open world of exploration, survival, crafting and city building. Start as a primitive and naked man or woman and build your character and tribe. You will pass traits on to your offspring and losing a tribe member in battle can have serious consequences. Your decisions will be your legacy.
- 10
Cepheus Protocol Anthology Season 1
Single-player alternative to Cepheus Protocol — playable solo, no multiplayer required. Shares Action and Indie with Cepheus Protocol.
Experience the outbreak of the Pangu Virus from multiple perspectives across as the brave heroes of the Center for Epidemic Research and Control battle tirelessly to stop the spread of a cataclysmic alien virus that has mutated innocent people into monstrous creatures of unimaginable power