Free games like Galactic Defense: Automation
Below are 8 free-to-play Steam games similar to Galactic Defense: Automation, 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 Galactic Defense: Automation page.
Ranked picks
- 1
Die in the Dungeon: Origins
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Strategy with Galactic Defense: Automation.
Fight your way through a mysterious dungeon in this deck-building, turn-based roguelike game where you don't use cards, but DICE! Deal with enemies by combining dice on your board, boost their effects with magical relics, and discover the story behind Die in the Dungeon!
- 2
The Last Sovereign
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Strategy with Galactic Defense: Automation.
Explore a world torn between armies of lust and purity in which everything is more complex than it seems, deciding the fate of nations through might, politics, and finance. Every decision matters in an intricate saga that tracks thousands of variables.
- 3
Dota 2
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Strategy with Galactic Defense: Automation.
Every day, millions of players worldwide enter battle as one of over a hundred Dota heroes. And no matter if it's their 10th hour of play or 1,000th, there's always something new to discover. With regular updates that ensure a constant evolution of gameplay, features, and heroes, Dota 2 has taken on a life of its own.
- 4
Crusader Kings II
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Strategy and Simulation with Galactic Defense: Automation.
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
- 5
AdVenture Capitalist
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window.
Welcome, eager young investor, to AdVenture Capitalist! Arguably the world's greatest Capitalism simulator!
- 6
Dota Underlords
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Strategy with Galactic Defense: Automation.
Hire a crew and destroy your rivals in this new strategy battler set in the world of Dota. Introducing Season One: Explore White Spire and earn rewards on the Battle Pass. Pick from several different game modes, play on your own or with friends, and take advantage of crossplay on PC and mobile.
- 7
Fallout Shelter
Free-to-play alternative to Galactic Defense: Automation — no purchase or trial window. Shares Simulation with Galactic Defense: Automation.
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 Galactic Defense: Automation — no purchase or trial window. Shares Strategy and Simulation with Galactic Defense: Automation.
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.