Single-player games like The Red Reactor
Below are 10 single-player Steam games similar to The Red Reactor, 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 The Red Reactor page.
Ranked picks
- 1
Kenshi
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Action and Strategy with The Red Reactor.
A free-roaming squad based RPG. Focusing on open-ended sandbox gameplay features rather than a linear story. Be a trader, a thief, a rebel, a warlord, an adventurer, a farmer, a slave, or just food for the cannibals. Train your men up from puny victims to master warriors.
- 2
Judgment: Apocalypse Survival Simulation
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Strategy and Indie with The Red Reactor.
Build, scavenge, craft, and perform occult rituals to survive in a demon-infested, post-apocalyptic colony simulation. Will you survive Judgment day?
- 3
Colony Survival
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Action and Strategy with The Red Reactor.
Colony Survival is a unique first-person strategy game developed by a two-man team. Build your own colony in a voxel world. Command guards, farmers, miners and other colonists. Defend your colony against the horde of monsters that attacks every night!
- 4
The Last Haven
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Strategy and Indie with The Red Reactor.
The world after a nuclear war. Manage the settlement, learn technology, make decisions, produce weapons, ammunition, organize defense, raid for supplies on other areas, do not let residents die, survive the nuclear winter.
- 5
Sapiens
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Strategy and Indie with The Red Reactor.
Create your own prehistoric civilization and lead your tribe in a world you shape. Start with nothing, build towns and industry, and advance through thousands of years of technological breakthroughs in this intimate yet expansive colony sim.
- 6
Havendock
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Strategy and Indie with The Red Reactor.
Breathe easy and thrive in this cozy colony sim. Build a haven for castaways, manage resources, live your best life on the ocean. Lead your humble settlement into a high-tech society.
- 7
Dig or Die
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Action and Strategy with The Red Reactor.
Crash land on a hostile planet where you'll have to build the strongest defenses if you wish to live to escape from it. But be warned... this planet is merciless. Build strong, and smart; else physics may flood or destroy your only hopes of survival.
- 8
Pathless Woods
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Strategy and Indie with The Red Reactor.
Embark on a cozy open-world survival journey inspired by ancient China's heritage. Gather resources, cultivate crops, build your dream home, and defend it from marauders. Team up with friends to explore and uncover a world where adventure meets serenity.
- 9
The Odd Battle
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Indie with The Red Reactor.
A sarcastic fight game about the world with the world.
- 10
Berserk Soccer
Single-player alternative to The Red Reactor — playable solo, no multiplayer required. Shares Action and Indie with The Red Reactor.
A soccer game with a brutal playing style.