Single-player games like ATMOSFAR
Below are 9 single-player Steam games similar to ATMOSFAR, 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 ATMOSFAR page.
Ranked picks
- 1

Fifth Sun: New Fire
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Survive the world of Mesoamerican mythology - alone or with friends. Gather, build, and survive your way through hostile wilds. Raid dungeons, appease the gods, and slay their monsters to offer them as sacrifices at the grand altar to reignite the Fifth Sun and open the gateway to the past suns.
- 2

Wildsite
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Crash-land on a sci-fi planet plagued by toxic plasma storms. Alongside Bob, your sarcastic AI companion, build and shrink your base to move it anywhere. Fight with primitive or plasma weapons in this survival-craft adventure solo or with up to 3 friends in online co-op!
- 3

Fragment Sky
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Build, upgrade and expand your own custom sky-ship as you explore the fragments of a lost world in the sky. Alone or with friends, you can explore different flying islands, trade with the locals, hunt wildlife, stage epic sky-battles and much more.
- 4

Primal Survival
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
A realistic prehistoric survival game where you play as Homo habilis or Homo erectus. Craft primitive tools, build shelter, hunt massive beasts, and survive the harsh forces of nature in a vast multiplayer world.
- 5

Windrose
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Adventure with ATMOSFAR.
Embark on a PvE survival adventure in the Age of Piracy. Fight on land and sea, solo or with friends. Build, craft and explore vast open world filled with dark secrets. Master soulslite combat and take on challenging bosses, command your ship and plunder unspoken treasures!
- 6

Dune: Awakening
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Adventure with ATMOSFAR.
Dune: Awakening is an Open World Survival RPG where you can fully immerse yourself in the epic world of Dune. Alone or with friends, explore a vast open world Arrakis, survive the sandworms, build a home, craft an ornithopter, and unravel the mystery of the missing Fremen.
- 7

Grounded 2
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Adventure with ATMOSFAR.
Shrunk again, but the world is much larger. In this open-world, single-player or co-op survival adventure, craft weapons and armor, build your base, and traverse the playground on your buggy. But something else is out there—and it hasn’t forgotten you.
- 8

MISERY
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
MISERY is a 1–5 player co-op survival game set in a nuclear disaster zone. Here, every day is a struggle: search radioactive ruins for resources, build your bunker, craft weapons, and explore a weird, procedurally-generated world with your friends. Beware of anomalies, monsters, and armed bandits.
- 9

Airport CEO
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Indie with ATMOSFAR.
Build and manage an international airport!