Free games like UFO: Aftershock
Below are 8 free-to-play Steam games similar to UFO: Aftershock, 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 UFO: Aftershock page.
Ranked picks
- 1
South Scrimshaw, Part One
Free-to-play alternative to UFO: Aftershock — 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.
- 2
PlanetSide 2
Free-to-play alternative to UFO: Aftershock — no purchase or trial window.
PlanetSide 2 is an all-out planetary war, where thousands of players battle as one across enormous continents. Utilize infantry, ground and air vehicles, and teamwork to destroy your enemies in this revolutionary first-person shooter on a massive scale.
- 3
Cell to Singularity - Evolution Never Ends
Free-to-play alternative to UFO: Aftershock — no purchase or trial window.
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
- 4
Alien Swarm
Free-to-play alternative to UFO: Aftershock — no purchase or trial window.
Co-operative multiplayer game and complete code base available for free.
- 5
MechWarrior Online™ Legends
Free-to-play alternative to UFO: Aftershock — no purchase or trial window. Shares Strategy with UFO: Aftershock.
MechWarrior Online™ Legends is a tactical, 'Mech-based online shooter set in the vast BattleTech Universe. Assume the role of an elite MechWarrior, piloting powerful BattleMechs, fighting for supremacy over the Inner Sphere.
- 6
Endless Sky
Free-to-play alternative to UFO: Aftershock — no purchase or trial window.
Endless Sky is a 2D space trading and combat game inspired by the classic Escape Velocity series. Work your way up from a relatively wimpy shuttle, cargo ship, or fighter, to a highly upgraded and customized flagship or to a massive fleet of warships or freighters.
- 7
Unnamed Space Idle
Free-to-play alternative to UFO: Aftershock — no purchase or trial window.
Destroy endless waves of alien ships that have all but wiped out humanity in this long form, unfolding, sci-fi idle game. Customize your ship with different weapons and defenses to defeat specific enemy types and utilize a ton of different systems to increase your overall power.
- 8
Sunrider: Mask of Arcadius
Free-to-play alternative to UFO: Aftershock — no purchase or trial window. Shares Strategy with UFO: Aftershock.
As Captain Kayto Shields, embark on a galactic voyage of heroism and survival. With his home world destroyed and his nation conquered, the inexperienced Captain Shields, and his newly minted vessel, the Sunrider, are left as the only hope against a galactic evil intent on subjugating all sentient life.