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
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.
- 2
Crown Trick
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie 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!
- 3
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.
- 4
Invisible, Inc.
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Take control of Invisible's agents in the field and infiltrate the world's most dangerous corporations. Stealth, precision, and teamwork are essential in high-stakes, high-profit missions, where every move may cost an agent their life.
- 5
Space Grunts
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
A turn-based game on a planet outpost - with no waiting between turns! Play it at the speed of an arcade game, or take your time and think about your next step.. no matter how fast you take your turn, it might be your last!
- 6
Tharsis
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Succeeding in Tharsis requires you to make the best of what you have, even if it happens to be a pair of snake eyes. Certain factors may be outside of your control, but that doesn’t mean they can’t be overcome. Tharsis is not a game about facing the odds. It’s a game about changing them.
- 7
The Last Spell
Single-player alternative to Steam Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Steam Marines.
Defend the last bastion of humanity with your squad of heroes! Exterminate fiendish monsters with magic and brute force by night and re-build your battered city defenses by day in this tactical RPG with rogue-lite mechanics.
- 8
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.
- 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.