About space slots
Space slots send the reels into orbit with planets, rockets and aliens. The theme is popular with cluster and cascading designs, but there is no single format.
The list includes every game with a space word in its title, ranked so you can compare RTP and max win.
RTP of space slots
The highest headline RTPs among space slots are Alien Fruits 2 by BGaming (97.17%), UFO Pyramids by BGaming (97.17%) and Alien Fruits 3 by BGaming (97%). The average headline RTP across all 26 is 96.38%, and the lowest is 95.97% on Alien Fruits.
3 of them (12%) are published in more than one RTP version, so the return depends on the version an operator runs. The widest gap is on Space Race: from 96.29% down to 84.22%.
Volatility and max win
Volatility is published for 18 of the 26 games: 2 low, 6 medium, 3 high and 7 very high.
The largest published max wins are 80,000× on Brute Force: Alien Onslaught, 17,288× on Starburst Galaxy and 14,649× on Space Donkey. The median max win of the 12 games that publish one is 7,200×. A max win is a rare ceiling, not a result to expect.
Studios, years and free demos
10 studios make the games in this list. The most represented are BGaming with 7 (average RTP 96.71%), NetEnt with 4 (average RTP 96.25%) and Pragmatic Play with 4 (average RTP 96.38%).
Release years run from 2012 to 2026; the newest are Alien Fruits 3 (2026), Rocket Eruption: Triple Blast (2026) and Cosmic Clusters! (2026).
24 of the 26 (92%) have a free official demo that runs on their page with no sign-up.