Single-player games like Project Legion
Below are 9 single-player Steam games similar to Project Legion, 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 Project Legion page.
Ranked picks
- 1

Nightmare: Les Origines
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
"Nightmare: Origins" is a multiplayer horror game for four players that immerses you in a nightmarish world between the realm of the dead and the realm of the living.Do you dare to face your fears and unravel the mysteries of Nightmare: Origins?
- 2

Summon: Joint escape
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
Summon: Joint Escape is a cooperative horror survival game for 1-4 players. Find a way to escape from a stalker in camouflage uniform who wants to give you a piece of paper with the inscription "Summon".
- 3

Back 4 Blood
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action with Project Legion.
Back 4 Blood is a thrilling cooperative first-person shooter from the creators of the critically acclaimed Left 4 Dead franchise. Experience the intense 4 player co-op narrative campaign, competitive multiplayer as human or Ridden, and frenetic gameplay that keeps you in the action.
- 4

Sneak Thief
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
Sneak Thief is a first person, shooter, strategy, stealth and puzzle game that lets you choose how you want to play. Use your wits and expertise to setup and perform heists whether that be by using brute force to smash your way through or by getting away without making a sound.
- 5

Remorse: The List
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
Remorse: The List is a classic survival horror game where the player must figure out what is happening in the little hungarian town of Hidegpuszta, and your only clue is a list that doesn't make much sense. Exploring will be the key to unveiling its secrets and get out of there alive.
- 6

Prodeus
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
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.
- 7

Space Hulk: Deathwing Enhanced Edition
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Adventure with Project Legion.
Space Hulk: Deathwing - Enhanced Edition is a First-Person Shooter based on Games Workshop’s cult classic board game set in Warhammer 40,000 universe. Expanding upon the original game, and featuring a host of new content, new features and a richer multiplayer mode.
- 8

Ready or Not
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
Ready or Not is an intense, tactical, first-person shooter that depicts a modern-day world in which SWAT police units are called to defuse hostile and confronting situations.
- 9

Project Nightmares Case 36: Henrietta Kedward
Single-player alternative to Project Legion — playable solo, no multiplayer required. Shares Action and Indie with Project Legion.
Project Nightmares is a survival horror game with a procedural structure, creating unique scares every time you play. A machine will induce you into a dream state, throwing you into a living nightmare firsthand in order to discover the story of Henrietta Kedward, an old woman with a dark past.