Single-player games like I'm lost in space
Below are 8 single-player Steam games similar to I'm lost in space, 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 I'm lost in space page.
Ranked picks
- 1
Intergalactic Defenders
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Adventure with I'm lost in space.
Intergalactic Defenders is a retro pixel art space shooter with rogue-like progression, handcrafted levels, deep ship customization, and intense arcade combat. Defend humanity against an alien invasion across the galaxy.
- 2
Star Devil
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
Star Devil is a Sci-fi Station Survival Roguelike Game with dynamic alien infection. Playable in both single player and split-screen co-op.
- 3
Mach K9
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action with I'm lost in space.
Physics roguelite. Smash aliens out of the arena to defeat them. Choose upgrades after each wave, and complete every wave to win. Unlock additional upgrades as you play.
- 4
ROGUE SHIFT
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
ROGUE SHIFT is a high-intensity top-down shooter, set on a harsh planet that will test your will to survive. To stay alive, you will pit yourself against hordes of relentless enemies in an unforgiving, hostile environment.
- 5
CRYPTARK
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
Cryptark is a 2D sci-fi shooter where you take on the role of a heavily armed privateer seeking to earn government contracts by boarding deadly alien space-hulks. It's up to you to strategize a plan of attack, pick an equipment loadout, and destroy the central core to be victorious.
- 6
Captain Forever Remix
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
Can you create the raddest spaceship? Captain Forever Remix is the spaceship builder roguelike. Voyage across the Solar System and blast apart randomly-generated enemies for spare parts. This is an officially-licensed re-imagining of the indie classic Captain Forever.
- 7
Rogue Spirit
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
Rogue Spirit is a 3D rogue-lite action game with light stealth elements. Play as the Ghost of the Prince of the Kingdom of Midra, possess enemy characters and absorb their unique skills to fight the evil presence that has corrupted your land.
- 8
Gatekeeper
Single-player alternative to I'm lost in space — playable solo, no multiplayer required. Shares Action and Indie with I'm lost in space.
Gatekeeper is a fast-paced rogue-like. Go on a quest to chase down Chaos and reclaim the stolen Heart of Time, fighting your way through relentless enemy forces. Play solo or in 4-player co-op and become the next Gatekeeper!