Single-player games like Radiation Hazard
Below are 8 single-player Steam games similar to Radiation Hazard, 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 Radiation Hazard page.
Ranked picks
- 1
Cyborg3003
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action and Adventure with Radiation Hazard.
6-player co-op survival horror at its finest! Cyborg, monsters and aliens. Free updates
- 2
Strike Team Delta
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action with Radiation Hazard.
Strike Team Delta is a gripping first-person shooter set in a post-apocalyptic world. Battle hordes of undead, team up with friends, and reclaim our world. Survival is in your hands.
- 3
DROSS
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action and Adventure with Radiation Hazard.
DROSS is a procedurally Generated FPS, set in a derelict facility infested with alien bugs. Explore, collect powerful weapons and equipment, to upgrade your gear and fight the Dross.
- 4
Undead City
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action with Radiation Hazard.
"Undead City" is a pulse-pounding first-person shooter set in a world devastated by a global pandemic. Humanity's last stand unfolds in this action-packed FPS where you must navigate a post-apocalyptic city swarming with zombies.
- 5
Guns & Dragons
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action and Adventure with Radiation Hazard.
coming soon!
- 6
Demon Spore
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action with Radiation Hazard.
Blast your way out of tentacle hell as a failed lab experiment gives birth to a rapidly growing viral horror in this intense action rogue-lite inspired by 80s Monster movies. Use the lab to your advantage and improvise an escape plan before this constantly evolving life form spreads out of control.
- 7
The Dust Between: Observer
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action and Adventure with Radiation Hazard.
A 1-4 player co-op horror strategy game where you guide unseen clients, draw the map, send commands, solve cases, and survive the dangers inside your own office.
- 8
Killing Floor 3
Single-player alternative to Radiation Hazard — playable solo, no multiplayer required. Shares Action with Radiation Hazard.
It’s 2091 and megacorp Horzine has produced the ultimate army: an obedient horde of bioengineered monsters called zeds. Now, join the rebel group Nightfall in this co-op action/horror FPS that puts you and your teammates in a battle for the future of humanity.