Free games like Sphere Invasion
Below are 8 free-to-play Steam games similar to Sphere 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 Sphere Invasion page.
Ranked picks
- 1
Counter-Strike:Global Offensive
Free-to-play alternative to Sphere Invasion — no purchase or trial window. Shares Action with Sphere Invasion.
Counter-Strike:Global Offensive (CS:GO) expands upon the team-based action gameplay that it pioneered when it was launched over 2 decades ago. CS:GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
- 2
The Lab
Free-to-play alternative to Sphere 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
DORONKO WANKO
Free-to-play alternative to Sphere Invasion — no purchase or trial window. Shares Action with Sphere Invasion.
『DORONKO WANKO』 is a DORONKO Action Game. In this game, You can become a cute, innocent Pomeranian, make your master's home messy and dirty. "Will the master be angry with me?" Don't worry. Because you are a sweet doggie.
- 4
Landfall Archives
Free-to-play alternative to Sphere Invasion — no purchase or trial window. Shares Action and Strategy with Sphere Invasion.
Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!
- 5
Control, I'm Not Coming Back
Free-to-play alternative to Sphere Invasion — no purchase or trial window.
Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.
- 6
Outpath: First Journey
Free-to-play alternative to Sphere Invasion — no purchase or trial window.
Outpath: First Journey is a prologue chapter of the main game, Outpath. An experimental clicker base building game. Craft, gather & manage resources, build your base and buy more islands to exploit and expand!
- 7
Epic Battle Fantasy 3
Free-to-play alternative to Sphere 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!
- 8
The Riftbreaker: Prologue
Free-to-play alternative to Sphere Invasion — no purchase or trial window. Shares Action and Strategy with Sphere 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.