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

Valheim
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
A collaborative exploration and survival game for 1-10 players, set in a procedurally generated afterlife inspired by Viking culture. Battle, build, and conquer your way to a saga worthy of Odin’s patronage!
- 2

Terraria
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!
- 3

Core Keeper
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Explore a vast cavern of creatures, relics and resources in a mining sandbox adventure for 1-8 players. Mine, build, fight, craft and farm to unravel the mystery of the ancient Core.
- 4

The Forest
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
As the lone survivor of a passenger jet crash, you find yourself in a mysterious forest battling to stay alive against a society of cannibalistic mutants. Build, explore, survive in this terrifying first person survival horror simulator.
- 5

Satisfactory
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Indie and Adventure with ATMOSFAR.
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
- 6

Crashlands
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Fight and tame alien beasts, craft resources into menacing weaponry, befriend the outlandish locals, and go toe-to-chin with a world-domineering maniac.
- 7

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!
- 8

Voidtrain
Single-player alternative to ATMOSFAR — playable solo, no multiplayer required. Shares Action and Indie with ATMOSFAR.
Become a crew member of an Interdimensional Express Train! Discover a new world full of mysterious creatures, enemies and places. Upgrade and customize your train, gather new materials and build better weapons. Play solo or online сo-op with up to 4 people.
- 9

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