Single-player games like Steam Marines
Below are 12 single-player Steam games similar to Steam Marines, 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 Steam Marines page.
Ranked picks
- 1
Bionic Dues
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Bionic Dues is a tactical, turn-based roguelite with mech customization. Out-think wide-ranging tactical situations featuring robots with bad GPS, terrible aim, insecurity, a lack of focus, a tendency to backstab, and dozens of other maladies to exploit.
- 2
Crowntakers
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Crowntakers combines turn-based strategy with RPG elements and takes you at the behest of the crown into a medieval fantasy world full of challenging encounters and epic adventures. With its randomly generated world, Crowntakers offers a varied gaming experience every time you set out to fight evil.
- 3
Shattered Planet
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Indie and RPG with Steam Marines.
Explore a dangerous planet that's different every time and try to survive! The Galactic Union's job for you is clear: research the alien wildlife -- for science! However, researching may include lasers, explosions, hungry aliens, space sushi, and other similarly delicious-or-terrifying hazards.
- 4
Rogue Waters
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and RPG with Steam Marines.
Rogue Waters is a Pirate Tactical Turn-Based Rogue-lite. Play as Captain Cutter, commanding your ship and crew through procedurally generated encounters to seek revenge. Recruit, train, and upgrade crew, use powerful sea creatures, and engage in dynamic naval and melee combat to gain the upper hand.
- 5
Ironcast
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Puzzlequest meets FTL in this Steampunk Victorian era roguelite.
- 6
Into the Breach
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Control powerful mechs from the future to defeat an alien threat. Each attempt to save the world presents a new randomly generated challenge in this turn-based strategy game.
- 7
Deep Sky Derelicts
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Indie and RPG with Steam Marines.
Deep Sky Derelicts is an original combination of turn-based strategy and RPG, enriched with tactical card combat and popular roguelike elements. Explore derelict alien ships, fight, loot and upgrade your gear, all in distinctive retro-futuristic comic book aesthetic style.
- 8
Crown Trick
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Indie and RPG with Steam Marines.
Enter a labyrinth that moves as you move, where mastering the elements is key to defeating enemies and uncovering the mysteries of this underground world. With a new experience awaiting every time you enter the dungeon, let the power bestowed by the crown guide you in this challenging adventure!
- 9
X-COM: UFO Defense
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy with Steam Marines.
You are in control of X-COM: an organization formed by the world's governments to fight the ever-increasing alien menace.
- 10
XCOM® 2
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy with Steam Marines.
XCOM 2 is the sequel to XCOM: Enemy Unknown, the 2012 award-winning strategy game of the year. Earth has changed and is now under alien rule. Facing impossible odds you must rebuild XCOM, and ignite a global resistance to reclaim our world and save humanity.
- 11
Space Hulk: Tactics (Classic)
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy with Steam Marines.
Space Hulk: Tactics is a faithful adaptation of the board game Space Hulk, set in the Warhammer 40,000 universe, bringing a unique twist to the cult classic formula. Engage in bloody battles as either a squad of Terminator Space Marines or the deadly alien Genestealers.
- 12
Steam Marines 2
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Steam Marines 2 leaves you in charge of the I.S.S. Delhi, ready to take back your space station.