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 November 01st 2025. Looking for even more deals? Explore the complete list of the top deals on sci-fi games.
Lists & Categories
1. Space Pilgrim Episode III: Delta Pavonis
Still reeling from the life-changing events of the previous episode, Gail seeks out a safe haven with her father in the Delta Pavonis system. However, she soon learns that the politics of Planet Leto can be as treacherous and unpredictable as the local weather. Space Pilgrim Episode III: Delta Pavonis is a game developed and published by . Released on February 04th 2016 has received 425 reviews of which 369 were positive and 56 were negative resulting in a rating of 8.1 out of 10.
8.1
369
56
-100%
2. Hardspace: Shipbreaker
Equipped with cutting-edge salvaging tech, carve & slice spaceships to recover valuable materials. Upgrade your gear to take on more lucrative contracts and pay your billion credits debt to LYNX Corp! Hardspace: Shipbreaker is a game developed and published by . Released on May 24th 2022 has received 20,422 reviews of which 18,276 were positive and 2,146 were negative resulting in a rating of 8.8 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in sci-fi games.
8.8
18,276
2,146
-99%
34.99€
0.64€
3. 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. Thanks to its incredible 99% discount, this game is now the #3 best deal in sci-fi games.
8.1
2,906
554
-99%
38.99€
0.66€
4. 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 #4 position in the best deals for sci-fi games.
7.6
594
150
-99%
24.99€
0.36€
5. Anomaly 2
Anomaly 2 is a sequel to the critically acclaimed Anomaly Warzone Earth. Maintaining the core elements of the original, Anomaly 2 adds plenty of new features: unit morphing, over million tactical combinations, post-apo world and tower defense vs tower offense multiplayer mode. Anomaly 2 is a game developed and published by . Released on May 15th 2013 has received 1,028 reviews of which 813 were positive and 215 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
813
215
-99%
13.99€
0.19€
6. Citizen Sleeper
Roleplaying in the ruins of interplanetary capitalism. Live the life of an escaped worker, washed-up on a lawless station at the edge of an interstellar society. Inspired by the flexibility and freedom of TTRPGs, explore the station, choose your friends, escape your past and change your future. Citizen Sleeper is a game developed and published by . Released on May 05th 2022 has received 8,105 reviews of which 7,522 were positive and 583 were negative resulting in an impressive rating of 9 out of 10. Currently offered at a significant 98% discount, this title has earned the #6 position in the best deals for sci-fi games.
9
7,522
583
-98%
19.50€
0.42€
7. DG2: Defense Grid 2
Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges. DG2: Defense Grid 2 is a game developed and published by . Released on September 23rd 2014 has received 3,163 reviews of which 2,723 were positive and 440 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for sci-fi games.
8.3
2,723
440
-98%
12.49€
0.29€
8. 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. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for sci-fi games.
7.9
648
124
-98%
27.99€
0.56€
9. 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. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for sci-fi games.
7.8
6,789
1,730
-98%
45.99€
0.97€
10. 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 98% discount, this title has earned the #10 position in the best deals for sci-fi games.
7.6
3,743
1,030
-98%
24.50€
0.60€
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