Top Deals on Sci-fi Games on Steam
Discover fantastic savings with the best discounts on a variety of sci-fi games available on Steam right now, updated on July 30th 2025. Looking for even more deals? Explore the complete list of the top deals on sci-fi games.
Lists & Categories
1. Battlestar Galactica Deadlock
In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival? Battlestar Galactica Deadlock is a game developed and published by . Released on August 31st 2017 has received 3,460 reviews of which 2,906 were positive and 554 were negative resulting in a rating of 8.1 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for sci-fi category.
8.1
2,906
554
-99%
38.99€
0.50€
2. Interstellar Space: Genesis
Interstellar Space: Genesis is a turn-based space 4X strategy game in which you attempt to build a thriving galactic empire. Discover mysteries among the stars, colonize worlds, and engage enemies in tactical turn-based combat on your journey to becoming the ruler of the galaxy! Interstellar Space: Genesis is a game developed and published by . Released on July 25th 2019 has received 772 reviews of which 648 were positive and 124 were negative resulting in a rating of 7.9 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in sci-fi games.
7.9
648
124
-99%
27.99€
0.46€
3. Homeworld: Deserts of Kharak
A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive. Homeworld: Deserts of Kharak is a game developed and published by . Released on January 20th 2016 has received 8,519 reviews of which 6,789 were positive and 1,730 were negative resulting in a rating of 7.8 out of 10. Thanks to its incredible 99% discount, this game is now the #3 best deal in sci-fi games.
7.8
6,789
1,730
-99%
45.99€
0.81€
4. Observation
Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M. Observation is a game developed and published by . Released on May 21st 2020 has received 4,773 reviews of which 3,743 were positive and 1,030 were negative resulting in a rating of 7.6 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for sci-fi games.
7.6
3,743
1,030
-99%
24.50€
0.47€
5. Ultros
ULTROS is a psychedelic metroidvania where you wake up stranded on The Sarcophagus — a cosmic uterus holding an ancient, demonic being. Trapped in the loop of a black hole, you will have to explore The Sarcophagus and meet its inhabitants to understand the part you play... Ultros is a game developed and published by . Released on February 13th 2024 has received 744 reviews of which 594 were positive and 150 were negative resulting in a rating of 7.6 out of 10. Currently offered at a significant 99% discount, this title has earned the #5 position in the best deals for sci-fi games.
7.6
594
150
-99%
24.99€
0.45€
6. State of Mind
State of Mind is a futuristic thriller game delving into transhumanism. The game explores themes of separation, disjuncture and reunification, in a world that is torn between a dystopian material reality and a utopian virtual future. State of Mind is a game developed and published by . Released on August 15th 2018 has received 2,195 reviews of which 1,720 were positive and 475 were negative resulting in a rating of 7.6 out of 10. Currently offered at a significant 99% discount, this title has earned the #6 position in the best deals for sci-fi games.
7.6
1,720
475
-99%
19.99€
0.37€
7. Shortest Trip to Earth
Shortest Trip to Earth is a roguelike spaceship simulator focused on exploration, ship management and tactical battles. Embark on a perilous journey across the universe with nuclear missiles, armed crew and a cat. Shortest Trip to Earth is a game developed and published by . Released on August 15th 2019 has received 1,390 reviews of which 1,072 were positive and 318 were negative resulting in a rating of 7.4 out of 10. Currently offered at a significant 99% discount, this title has earned the #7 position in the best deals for sci-fi games.
7.4
1,072
318
-99%
25.13€
0.48€
8. Aven Colony
Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world. Aven Colony is a game developed and published by . Released on July 25th 2017 has received 2,638 reviews of which 1,921 were positive and 717 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #8 position in the best deals for sci-fi games.
7.1
1,921
717
-99%
29.99€
0.49€
9. Rebel Galaxy Outlaw
Out of cash, out of luck, out on the fringe. Juno Markev has a killer to tail, a debt to pay, and more trouble headed her way. Rebel Galaxy Outlaw takes place in a greasy, blue-collar world of outlaws, truckers, cops and thieves. Rebel Galaxy Outlaw is a game developed and published by . Released on September 22nd 2020 has received 1,033 reviews of which 659 were positive and 374 were negative resulting in a rating of 6.2 out of 10. Currently offered at a significant 99% discount, this title has earned the #9 position in the best deals for sci-fi games.
6.2
659
374
-99%
24.99€
0.42€
10. XCOM: Enemy Unknown
The XCOM: Enemy Unknown - Slingshot Pack is Now Available! XCOM: Enemy Unknown is a game developed and published by . Released on October 11th 2012 has received 56,414 reviews of which 52,717 were positive and 3,697 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for sci-fi games.
9.2
52,717
3,697
-98%
19.99€
0.47€
More Sci-fi & Related Games
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