Single-player games like Alien Marauder
Below are 9 single-player Steam games similar to Alien Marauder, 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 Alien Marauder page.
Ranked picks
- 1
They Are Billions
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy with Alien Marauder.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
- 2
Diplomacy is Not an Option
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy with Alien Marauder.
Diplomacy is Not an Option is a strategy game set in a medieval fantasy world. Build your town and defenses, raise huge armies and fight against massive hordes of enemies. How long can you survive?
- 3
From Glory To Goo
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy and Simulation with Alien Marauder.
From Glory To Goo is a Sci-Fi survival RTS set on an alien world. Serve as humanity's bulwark by establishing a colony and supporting your colonists still in orbit. But beware, for The Goo, a relentless and shape-shifting force approaches from all sides, even above and below.
- 4
IDUN - Frontline Survival
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy with Alien Marauder.
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!
- 5
Here Comes The Swarm
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy and Simulation with Alien Marauder.
Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?
- 6
Ashes of the Singularity: Escalation
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy and Simulation with Alien Marauder.
A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat.
- 7
Stranded: Alien Dawn
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Simulation and Strategy with Alien Marauder.
Brave a new world in Stranded: Alien Dawn, a planet survival sim placing the fate of a small marooned group in your hands. Forge your story through compelling and immersive strategic gameplay as you make vital decisions to protect your survivors.
- 8
Warlords Under Siege
Single-player alternative to Alien Marauder — playable solo, no multiplayer required. Shares Strategy and Simulation with Alien Marauder.
Warlords Under Siege is a mix of RTS and Roguelike genre, where you build a small city and defend it against continuous waves of enemies. Improve your assortment of weapons with each playthrough, unlocking new possibilities to beat the ever-increasing threat.
- 9
The Riftbreaker
Single-player alternative to Alien Marauder — playable solo, no multiplayer required.
The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.