Free games like Iron Sky: Invasion
Below are 8 free-to-play Steam games similar to Iron Sky: Invasion, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Iron Sky: Invasion page.
Ranked picks
- 1
Ultimate Custom Night
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window. Shares Action with Iron Sky: Invasion.
Welcome to the ultimate FNAF mashup, featuring 50 selectable characters and custom difficulties!
- 2
The Lab
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window.
Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!
- 3
Epic Battle Fantasy 3
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window.
Epic Battle Fantasy 3 is a silly turn-based JRPG, full of useless NPCs, rabid cats, childish humor, unreasonably large weapons, anime boobs, and other nonsense. And it's totally free!
- 4
The Riftbreaker: Prologue
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window. Shares Action and Strategy with Iron Sky: Invasion.
The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.
- 5
PlanetSide 2
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window. Shares Action with Iron Sky: Invasion.
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
- 6
AdVenture Capitalist
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window.
Welcome, eager young investor, to AdVenture Capitalist! Arguably the world's greatest Capitalism simulator!
- 7
Fallout Shelter
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window. Shares Simulation with Iron Sky: Invasion.
Fallout Shelter puts you in control of a state-of-the-art underground Vault from Vault-Tec. Build the perfect Vault, keep your Dwellers happy, and protect them from the dangers of the Wasteland.
- 8
Clicker Heroes
Free-to-play alternative to Iron Sky: Invasion — no purchase or trial window. Shares Strategy and Simulation with Iron Sky: Invasion.
Click your way through hordes of monsters, earn gold, and recruit quirky heroes with powerful skills. Progress even while you're idle, and watch the numbers climb into the absurd. It’s a never-ending journey of clicks, crits, and colossal damage.