Single-player games like COSMONAUT
Below are 8 single-player Steam games similar to COSMONAUT, 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 COSMONAUT page.
Ranked picks
- 1
Terraria
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Dig, fight, explore, build! Nothing is impossible in this action-packed adventure game. Four Pack also available!
- 2
Morbid: The Seven Acolytes
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Morbid: The Seven Acolytes is a Horrorpunk Action RPG filled with Lovecraftian horrors and Cronenbergian gore, making it the most gruesome take on the isometric Souls-like genre yet!
- 3
Lamentum
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Lamentum is a pixel art survival horror game, set in New England in the mid-nineteenth century.
- 4
ANIMAL WELL
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Explore a dense, interconnected labyrinth, and unravel its many secrets. Collect items to manipulate your environment in surprising and meaningful ways. Encounter beautiful and unsettling creatures, as you attempt to survive what lurks in the dark. There is more than what you see.
- 5
CrossCode
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
A retro-inspired 2D Action RPG set in the distant future. CrossCode combines 16-bit SNES-style graphics with butter-smooth physics, a fast-paced combat system, and engaging puzzle mechanics, served with a gripping sci-fi story.
- 6
Shovel Knight: Treasure Trove
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Shovel Knight: Treasure Trove is the complete Shovel Knight collection, containing all 5 games in the epic saga! Dig, blast, slash, and bash your way through a fantastical, 8-bit inspired world of pixel-perfect platforming, memorable characters, and world-class action-adventure gameplay.
- 7
Streets of Rogue
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
Fight, sneak, and hack your way through randomly generated cities. It's like Nuclear Throne meets Deus Ex, mixed with the anarchy of GTA. Rogue-lite meets immersive sim, and goes completely insane.
- 8
Demon Peak
Single-player alternative to COSMONAUT — playable solo, no multiplayer required. Shares Action and Indie with COSMONAUT.
In Demon Peak, you play as the nameless warrior, trapped inside the depths of an unholy Mountain. Explore the mysterious and perilous enviroments, fight against a multitude of different enemies and gather magical abilities to overcome the Mountain's evil inhabitants.