Single-player games like Sphere Invasion
Below are 8 single-player Steam games similar to Sphere Invasion, 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 Sphere Invasion page.
Ranked picks
- 1
AI War 2
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Strategy with Sphere Invasion.
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.
- 2
Taur
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Action and Strategy with Sphere Invasion.
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
- 3
Stronghold Crusader HD (2012)
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Strategy with Sphere Invasion.
The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.
- 4
Battlefleet Gothic: Armada (Classic)
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Strategy with Sphere Invasion.
Battlefleet Gothic: Armada is the RTS videogame adaptation of Games Workshop’s classic tabletop game, pitting the Chaos, Imperium, Eldar, and Orks against each other in visceral space-battles.
- 5
Total War: THREE KINGDOMS
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Action and Strategy with Sphere Invasion.
Total War: THREE KINGDOMS is the first in the award-winning series to recreate epic conflict across ancient China. Combining a gripping turn-based campaign of empire-building & conquest with stunning real-time battles, THREE KINGDOMS redefines the series in an age of heroes & legends.
- 6
Company of Heroes
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Action and Strategy with Sphere Invasion.
Delivering a visceral WWII gaming experience, Company of Heroes redefines RTS by bringing the sacrifice of heroic soldiers, war-ravaged environments, and dynamic battlefields to life. Please visit the "Company of Heroes - Legacy Edition" page for additional user reviews.
- 7
Door Kickers 2: Task Force North
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Action and Strategy with Sphere Invasion.
Command military Special Ops Teams in gripping tactical combat against a Middle East-based terrorist network. Sequel to RockPaperShotgun's "Best Tactics Game of 2014".
- 8
Steel Division: Normandy 44
Single-player alternative to Sphere Invasion — playable solo, no multiplayer required. Shares Action and Strategy with Sphere Invasion.
Steel Division: Normandy is a tactical real-time strategy (RTS) game that pits players against AI enemies in a single-player campaign -- or against several opponents in massive 10-on-10 multiplayer battles.