Free games like Space Imperia 4X
Below are 8 free-to-play Steam games similar to Space Imperia 4X, 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 Space Imperia 4X page.
Ranked picks
- 1
Counter-Strike:Global Offensive
Free-to-play alternative to Space Imperia 4X — no purchase or trial window.
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 Space Imperia 4X — 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
Landfall Archives
Free-to-play alternative to Space Imperia 4X — no purchase or trial window. Shares Strategy with Space Imperia 4X.
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!
- 4
Die in the Dungeon: Origins
Free-to-play alternative to Space Imperia 4X — no purchase or trial window. Shares Strategy with Space Imperia 4X.
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!
- 5
NERTS! Online
Free-to-play alternative to Space Imperia 4X — no purchase or trial window.
NERTS! Online is a fast-paced competitive solitaire game for you and up to five of your friends, played the same way we play it at the Zachtronics office!
- 6
South Scrimshaw, Part One
Free-to-play alternative to Space Imperia 4X — no purchase or trial window.
South Scrimshaw is the story of a newborn whale in a vast alien ocean. It is a richly illustrated experimental visual novel, written in the style of a nature documentary.
- 7
Jigsaw Puzzle Dreams
Free-to-play alternative to Space Imperia 4X — no purchase or trial window.
Beautiful Multiplayer Jigsaw Puzzle game where you can design the room you play in!
- 8
Shape of Dreams: Prologue
Free-to-play alternative to Space Imperia 4X — no purchase or trial window.
《Shape of Dreams: Prologue》is a unique game that blends action roguelite with MOBA-style gameplay. Edit your character's Memories to create your own champion. Face all challenges alone or play with friends in up to 4-player co-op.