Single-player games like Iron Marines
Below are 17 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
Aliens: Dark Descent
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Drop into the gripping journey of Aliens: Dark Descent, a squad-based, single-player action game in the iconic Alien franchise. Lead your soldiers in real-time to stop a new and terrifying kind of Xenomorph outbreak on Planet Lethe.
- 3
Infested Planet
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
- 4
Space Crew: Legendary Edition
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Time for your toughest mission yet! Recruit and train your crew to tackle the growing threat from alien and android armies as you defend Earth to become a Galactic Legend in Space Crew: Legendary Edition. All new content free to existing owners of Space Crew!
- 5
Starship Troopers: Terran Command
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy with Iron Marines.
Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!
- 6
Sins of a Solar Empire: Trinity®
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
- 7
DG2: Defense Grid 2
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.
- 8
AI War 2
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Strategy and Indie with Iron Marines.
The most devious and acclaimed artificial intelligence in strategy gaming is better than ever. A grand strategy/RTS hybrid that reverses many conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground.
- 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?
- 17
Kingdom Rush 6: Genesis TD
Single-player alternative to Iron Marines — playable solo, no multiplayer required. Shares Action and Strategy with Iron Marines.
Kingdom Rush 6: Genesis is a fantasy tower defense strategy game that takes you back in time to the early days of the Kingdom with bold new twists. Build towers, command heroes, and stop Vez’nan’s corruption before it tears the kingdom apart!