Single-player games like Iron Marines
Below are 16 single-player Steam games similar to Iron 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 Iron Marines page.
Ranked picks
- 1
Iron Marines Invasion
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Prepare to take off, soldier! The galaxy needs your strategy! Prove your RTS expertise, explore an entire galaxy and defend it from a threatening invasion.
- 2
Sphere Invasion
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Sphere Invasion is Sci-Fi Tower Defence. Build your own road and defend it with 7 unique towers.
- 3
Project Myriad 2
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
Project Myriad 2 is a tower defense strategy game. Build towers on a grid of hexagons floating in space. 35 levels with unique tiles and mechanics each providing a unique challenge. 3 difficulty levels including extreme mode which has never ending waves of enemies. Strive for your new high score!
- 4
CHAOTIC ERA
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
AT THE LIMITS OF EARTH, AT THE EXTREMITY OF HEAVEN. A REAL-TIME STRATEGY NIGHTMARE.
- 5
Microcosmum 2
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
A relaxing strategy game featuring unconventional gameplay. Your objectives include development, evolution, border expansion and protection of your hive.
- 6
Terminal squad: Swarmites
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Terminal squad: swarmites is a game with indirect control where you must erect a chain of buildings, which generate resources for construction or the combat units for destruction of an enemy.
- 7
Tactical Command
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Assemble armies of soldiers, lead them into battle, conquer your enemies and move one step closer to galactic domination!
- 8
Uncharted Space - project 3062
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
In this game, you are a leader, leading a force of army to fight other forces in the deep spaces. You will plunder their resources, build your homelands, explore and expand, managing your army both strategically and tactically. This will be a saga written with blood and fire.
- 9
SC2VN - The eSports Visual Novel
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Indie with Iron Marines.
SC2VN is a visual novel about the South Korean StarCraft 2 scene. You play as Mach, a foreign semi-pro trying to make it in eSports who soon learns that success in StarCraft takes more than in-game strategy.
- 10
守卫魔兽-Guardian of Warcraft
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
This is a summoning tower defense strategy game, with different abilities of monsters and traps, with different effects. the player will continue to upgrade while defending, Become stronger, and summoning more powerful monsters to resist the brave.
- 11
Kingdom Rush - Tower Defense
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy with Iron Marines.
Get ready for an epic journey to defend your kingdom against hordes of orcs, trolls, evil wizards and other nasty fiends using a vast arsenal of towers and spells at your command!Fight on forests, mountains and wastelands, customizing your defensive strategy with different tower upgrades and specializations!
- 12
Kingdom Rush 5: Alliance TD
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
While a formidable evil emerges, an unexpected alliance is taking shape! It will take the finest warriors of Linirea and the relentless Dark Army to stop it. Beware! Though they may journey side by side the ever-changing winds of fate could swiftly alter their course.
- 13
Kingdom Rush Frontiers - Tower Defense
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy with Iron Marines.
Command your troops through an epic (mis)adventure as you defend exotic lands from dragons, man-eating plants, and ghastly denizens of the underworld -all with flashy new towers, levels, heroes, and more goodies to help you crush your foes in this Fantasy Action Tower Defense game!
- 14
Kingdom Rush Vengeance - Tower Defense
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy with Iron Marines.
It's payback time! Lead your mighty dark army and make the Kingdom tremble with every step. Build powerful towers, choose your arsenal for destruction, and find the deadliest combination - train legendary heroes and lead them to victory!
- 15
Kingdom Rush Origins - Tower Defense
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
Command your elven army and defend mystical lands from sea serpents, evil sorcerers, and wave after wave of gnoll tribesman, all with the help of brand-spankin’ new towers, heroes, and spells to fend off every last baddie.
- 16
Legends of Kingdom Rush
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
RPG turn-based combat game with deep tactics and bad jokes! Do you have what it takes to save the kingdom?