Single-player games like Psi Project: Legacy
Below are 13 single-player Steam games similar to Psi Project: Legacy, 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 Psi Project: Legacy page.
Ranked picks
- 1
Psi Project
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
Psi Project is a hardcore 2D shooter with elements of horror. The main character wakes up in an unknown place. Absolutely remembers nothing. Who he is and how he got here. Throughout search of answers he is strongly plagued by different kinds of hallucinations.
- 2
Zombie Freaks
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
Fast paced retro shooting fps action. Explore the dark tunnels of a paramilitary Siberian base. Kill the mutant zombie freaks within. Find the key to the next level of blood soaked insanity. Unleash the brutal killing machine within you. Take no prisoners.
- 3
HEADCUTTER
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Adventure with Psi Project: Legacy.
HEADCUTTER is a sci-fi spaghetti western FPS with brutal combat, destructible environments, and lots of gore. Track targets as a space bounty hunter, explore maps with multiple routes, and use the crunchy gunplay to cut their heads off so you can get your money!
- 4
Ion Fury
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
3D Realms, creators of Duke Nukem 3D, Prey, and Max Payne, team up with Voidpoint to bring back the legendary Build Engine, famous for classic shooters like Duke Nukem 3D, Shadow Warrior, and Blood. Fast-paced FPS combat across huge, secret-packed levels. Ion Fury is the real deal!
- 5
DOOMED
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
DOOMED is a First Person Shooter with horror elements, heavily inspired by old-school shooter classics.
- 6
CRIMSON METAL Classic 1999
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
CRIMSON METAL - Far from Perfect, brutal and merciless.
- 7
The Citadel
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
The Citadel is a brutal first person shooter, and a love letter to classic games such as Marathon, Doom and Wolfenstein 3d. Descend into the depths of a dark citadel, and fight through 6 Episodes and 30 levels of action packed with 6 challenging bosses. Go forth, Martyr.
- 8
Prodeus
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
Prodeus is a first-person shooter of old, re-imagined using modern rendering techniques and technology. Experience the quality you’d expect from a modern AAA game, designed with retro aesthetics and gameplay that invoke the tech-imposed limits of older hardware.
- 9
Wolfenstein 3D
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action with Psi Project: Legacy.
World War II rages. The Nazis are planning to build an unstoppable, mutant army. On a mission to steal the secret plans, you were captured and imprisoned. Now, a lucky break gives you the chance to escape, but a maze of passages and trigger-happy Nazis stand in your way.
- 10
Aliens vs. Predator™
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action with Psi Project: Legacy.
Survive, hunt and prey in the deadly jungles and swamps in distinctly new and thrilling first person gameplay.
- 11
DOOM
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action with Psi Project: Legacy.
Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.
- 12
Crazy Scientist
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Indie and Adventure with Psi Project: Legacy.
Crazy Scientist - is a simple, intuitive 2D platformer with original, beautiful graphics suitable for all ages. In this platformer you have to pass a variety of picturesque levels for a mad scientist. Your main mission is to complete levels by gathering vials.
- 13
Battle of Frigates
Single-player alternative to Psi Project: Legacy — playable solo, no multiplayer required. Shares Action and Indie with Psi Project: Legacy.
Have you ever played in Tanks in dendy? What if the battles took place at sea? Before you there is an ideological continuation - Battle of Frigates. Battle of Frigates – fun top down shooter where you are in the role of a frigate are fighting on the water, your enemies - the hostile enemy frigates, their bosses, guns, mines.