Single-player games like MUTATION PHASE
Below are 8 single-player Steam games similar to MUTATION PHASE, 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 MUTATION PHASE page.
Ranked picks
- 1
SAFE INSIDE
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action with MUTATION PHASE.
Stay close together and use teamwork to fight through hordes of infected and other mutated freaks while navigating between saferooms.
- 2
DOOM 3 Resurrection of Evil
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action with MUTATION PHASE.
The gripping expansion pack for DOOM 3 takes your even further into the the DOOM universe. Two years following the unexplained disaster on Mars, the UAC returns to the abandoned facility to investigate a mysterious beacon buried deep in the ruins of the ancient civilization.
- 3
Putrefaction
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action and Indie with MUTATION PHASE.
Putrefaction is a First Person Shooter with horror elements, lots of enemies and weapons, heavily inspired by old-school shooter classics.
- 4
DOOM 3
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action with MUTATION PHASE.
A demonic invasion has overwhelmed the Union Aerospace Corporation's Mars research facility. As one of only a few survivors, you must fight your way to hell and back against a horde of demons in this award-winning horror/action FPS and reimagining of the original DOOM.
- 5
Zombies on a Plane
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action and Indie with MUTATION PHASE.
Take on the role of the captain of a troubled jumbo jet carrying infected passengers intent on bringing the plane out of the sky, or pit yourself against hundreds of zombies in the interior of a jumbo jet or even walk along the outside as you fight to regain control as one of the passengers.
- 6
Killing Floor: Incursion
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action with MUTATION PHASE.
Killing Floor: Incursion is a fully-realized, multi-hour, story-driven adventure with an additional endless mode. In solo or co-op mode, travel diverse environments, from creepy farmhouses to the catacombs of Paris, in order to uncover who... or what is behind the Zed menace.
- 7
Dead Effect
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action and Indie with MUTATION PHASE.
Fight for your life in the INDIE SCI-FI FPS game fit for both casual and hard-core gamers with a passion for hunting down hordes of zombies. Prepare yourselves for the incoming nightmare!
- 8
Dead Effect 2
Single-player alternative to MUTATION PHASE — playable solo, no multiplayer required. Shares Action and Indie with MUTATION PHASE.
Dead Effect 2 is the newest addition to the acclaimed Dead Effect franchise. This action sci-fi shooter is looking to push the boundaries of first-person shooters to new levels with slick graphics, rich narrative and RPG elements.