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
Admirals of Ophiuchus
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Design massive ships, bristling with weapons, on a macro scale. Engage in fleet-vs-fleet battles, featuring many different tactics. Play alone or in Coop combat missions, or form two teams of players (each with own fleet) to fight in an arena.
- 2
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!
- 3
Old Stars
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
A fast-paced 4X galaxy you can actually finish. Expand by colonising and besieging rival worlds, wield government powers that bend the rules - freeze enemy fleets, sever hyperlanes, vanish into stealth - and race rivals to claim the galactic core. A grand-strategy empire in an evening, not a month.
- 4
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!
- 5
Orbital Strike
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Simulation with Defending Earth.
A real-time strategy game of orbital warfare. Build satellites, launch them into chosen orbits, and fight for control of the sky. Your assets stay invisible until an enemy sensor finds them. Every strike depends on being overhead at the right moment.
- 6
Ares Inception
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Strategy and Simulation with Defending Earth.
You're the intelligent electronics of a Mars mission. Four capable crew members. You are not one of them. Your job: keep them alive and happy, they're the only ones who can succeed. Built under the advice of real astronauts, engineers & planetary scientists, the big decisions are yours to make.
- 7
Above Earth
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Above Earth is a science fiction survival game. Experience a struggle for life in the fragile artificial environment of a damaged space station.
- 8
Rank: Warmaster
Single-player alternative to Defending Earth — playable solo, no multiplayer required. Shares Action and Strategy with Defending Earth.
Stranded on Mars with next to nothing, build a city, assemble a fleet, and expand your empire to survive a hostile solar system in this new take that combines elements of space combat and RTS inspired by the classics.