Single-player games like Delusion Out of Space
Below are 8 single-player Steam games similar to Delusion Out of 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 Delusion Out of Space page.
Ranked picks
- 1
Undead Space
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Indie with Delusion Out of Space.
SPACE - FEAR, AND NO ONE WILL HELP YOU ............. A mix of horror and complete hopelessness. Explore dark corridors, isolated research modules, and abandoned Martian complexes. Here, you are completely alone, surrounded by the undead. Survive by immersing yourself in cosmic SURVIVAL HORROR.
- 2
Omniscient
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Indie with Delusion Out of Space.
Omniscient is a first person horror set aboard a research ship drifting in Neptune's orbit. Your crew is gone. The power is out. And something else lurked onboard. Unarmed and alone, trust your newly enhanced senses to survive. They are your greatest gifts, after all.
- 3
DERELIKT
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Indie with Delusion Out of Space.
DERELIKT is a narrative retro FPS built for fans of claustrophobic PS1-era sci-fi horror.
- 4
Matchstick: Cosmic Flame
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Indie with Delusion Out of Space.
A time and space bending cosmic intelligence has found its way to Earth. Your family has been taken. Travel through wormholes, explore nightmarish environments, solve unearthly puzzles, and combat demonic entities to defeat the interstellar parasite known as the MATCH.
- 5
Voyager-19
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Indie with Delusion Out of Space.
A short horror game where you control a decaying spacecraft exploring distant star systems.
- 6
Halo: Campaign Evolved
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Adventure with Delusion Out of Space.
Halo: Campaign Evolved is a faithful yet modernized remake of Halo: Combat Evolved’s campaign, rebuilt from the ground up.
- 7
SOMA
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Indie with Delusion Out of Space.
From the creators of Amnesia: The Dark Descent comes SOMA, a sci-fi horror game set below the waves of the Atlantic ocean. Struggle to survive a hostile world that will make you question your very existence.
- 8
Dead Space (2008)
Single-player alternative to Delusion Out of Space — playable solo, no multiplayer required. Shares Action and Adventure with Delusion Out of Space.
You are Isaac Clarke, an engineer on the spacecraft USG Ishimura. You're not a warrior. You're not a soldier. You are, however, the last line of defense for the remaining living crew.