Single-player games like Defending Earth
Below are 8 single-player Steam games similar to Defending Earth, 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 Defending Earth page.
Ranked picks
- 1
Attack on Toys
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Relive Your Childhood Toys comes to life! Build your Army Toys, make battle scenario, watch the Toys battling each other, and customize your play with Attack on Toys Toy Box. Command your Army Toys to fight againts another toys strategically and keep them alive during battle!
- 2
DOUGH: A Crime Strategy RPG
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Simulation with Defending Earth.
A crime based 4X strategy game with heavy RPG elements. Money, power, women... in the Prohibition, the world of crime is prospering, but in it, the road to the top is filled with blood. The ruthless competition, the greedy politicians and the pesky policemen, everyone wants to come out on top!
- 3
Rugby Union Team Manager 4
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Simulation with Defending Earth.
The fourth instalment of “The Number 1 Rugby Union Management Game”. Rugby Union Team Manager 4 gives you full control of managing your own Rugby Union team. Training schedules, coaches, physios, scouting, finances, sponsors, facilities and more. MUCH MORE!
- 4
Space Reign
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
An indie space-sim and strategy game featuring ship and fleet combat mixed with RTS elements. Complete contracts and Claim sectors for your faction in the near-future, where resource exploiting corporations are in a state of constant conflict over territory control.
- 5
Galactic Crew
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Galactic Crew II is a roguelike space exploration game inspired by FTL and the classic XCOM games. You and your valorous crew members will explore a galaxy with all its dangers and riches. Explore and colonize planets, customize your spaceship, raid underground dungeons, mine, trade and craft!
- 6
Riftborne
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Indie with Defending Earth.
Riftborne is a classic terminal based, real time, grand strategy game. Construct space ships. Take part in factional warfare. Hire galactic hit-men on your rivals. Raid neighbors for rare resources. Train spies to infiltrate enemy bases for key intel. Grow your empire to dominate the galaxy.
- 7
Galactic Dream: Rage of War
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Humanity is racing through space on the wings of hope, away from the emerging threat of a cosmic cataclysm that could spell extinction. And mysterious aliens with powers beyond imagining follow them everywhere they go.
- 8
Space Colony: Steam Edition
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Simulation with Defending Earth.
Space Colony: Steam Edition is a remaster of the real-time base builder and strategy game from Firefly Studios, creators of the Stronghold series. In Space Colony you colonize to survive, designing intergalactic bases that keep your crew productive, happy and defended against hostile alien threats.