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List of the top Sci-fi games:

12432 games found
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Halo: Spartan Assault

 Halo: Spartan Assault

6.6 3191 851
4 Apr, 2014

Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *

Command & Conquer 3 Tiberium Wars™

 Command & Conquer 3 Tiberium Wars™

8.0 6361 690
13 Nov, 2009

The year is 2047. A massive nuclear fireball explodes high in the night sky, marking the dramatic beginning of the Third Tiberium War and the long-awaited return of the most groundbreaking Real-Time Strategy franchise of all time

Ancient Space

 Ancient Space

2.3 108 149
23 Sep, 2014

Ancient Space is a story driven single player real time strategy game where you take command of a fleet embarking on a scientific mission to chart undiscovered reaches of space called ‘The Black Zone’. Overcome overwhelming odds and fight for your life and the survival of your ship and its crew.

ENDLESS™ Space 2

 ENDLESS™ Space 2

8.2 13495 2527
18 May, 2017

ENDLESS™ Space 2 is a Strategic Space Opera, featuring the compelling “just one more turn” gameplay, set in the mysterious ENDLESS™ Universe. As the leader of your civilization, will you impose your vision and build the greatest stellar empire?

Defense Grid: The Awakening

 Defense Grid: The Awakening

8.0 4028 147
8 Dec, 2008

Defense Grid: The Awakening is a unique spin on tower defense gameplay that will appeal to players of all skill levels. A horde of enemies is invading, and it's up to the player to stop them by strategically building fortification towers around their base.

Check out these great games:

Knock on the Coffin Lid on SteamPlantera2 on SteamTerminus on SteamUmbra - The Last Summoner on Steam

If you'd like to promote your game here just send a letter to [email protected]

Hate Plus

 Hate Plus

5.2 404 75
19 Aug, 2013

Let's spend the next three real-time days together uncovering the mystery of what went horribly wrong on a derelict generation ship, with the help of a spunky/more-than-slightly-traumatized AI sidekick! A sequel to Analogue: A Hate Story that tells a whole new hate story of its own.

Everreach: Project Eden

 Everreach: Project Eden

2.8 164 178
4 Dec, 2019

Take on the role of Nora Harwood, member of Everreach’s Security Division, on a mission to secure the colonization process of Eden and investigate mysterious incidents! Everreach: Project Eden is a fast-paced, story-driven action-RPG set on the visually stunning Planet Eden.

Halo: Spartan Strike

 Halo: Spartan Strike

5.8 1113 264
16 Apr, 2015

Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*

Check out these great games:

Knock on the Coffin Lid on SteamUmbra - The Last Summoner on SteamTerminus on SteamPlantera2 on Steam

If you'd like to promote your game here just send a letter to [email protected]

Space Pilgrim Episode I: Alpha Centauri

 Space Pilgrim Episode I: Alpha Centauri

6.3 1069 143
21 Dec, 2015

Captain Gail Pilgrim has been flying starships since she was a kid, ferrying passengers between planets and space stations across the galaxy. She has no reason to expect that this latest trip to Alpha Centauri will be anything special, even if her passengers are a little more diverse than usual....

Star Trek Online

 Star Trek Online

7.8 15177 4051
31 Jan, 2012

In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.

Deus Ex: The Fall

 Deus Ex: The Fall

3.0 1275 2198
17 Mar, 2014

Deus Ex: The Fall is set in 2027– a golden era for science, technology and human augmentation, but also a time of great social divide and global conspiracy. Powerful corporations have seized control from governments and command the drug supply needed by augmented humans to survive.

Parcel

 Parcel

4.0 96 18
22 Apr, 2015

Parcel is an atmospheric block-pushing puzzle game where your goal is to solve interlocking laser puzzles by using the unique abilities of different characters. Switch between members of your team of postpeople and make your way through mind benders in a charming, ridiculous cyberpunk future!

The Fall

 The Fall

7.0 2412 332
30 May, 2014

Take the role of ARID, the artificial intelligence within a high-tech combat suit. The Fall is a unique combination of adventure-game puzzle solving and side-scroller action, all set within a dark and atmospheric story. Get ready for a disturbing journey as you explore the world of The Fall.

Deus Ex: Invisible War

 Deus Ex: Invisible War

4.3 1078 796
29 Mar, 2007

Approximately 20 years after the events depicted in Deus Ex, The World is only beginning to recover from a Catastrophic worldwide depression. In the Chaotic period of recovery, several religious and political factions see an opportunity to re-shape a worldwide government to their agendas, understanding that the right moves now could...

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