Unlike "one time through" story games, SAIS sets up differently each time it is played. Stars, black holes, planets, nebulae, artifacts, alien patrols, gadgets, lifeforms and dozens of events and encounters are randomized for each game session. It is also very short. Game sessions typically last from 3 to 20 minutes, hence the game's tagline "Explore the galaxy in 20 minutes or less!"
Ernest Adams, writing for Gamasutra in 2005, described SAIS as "The perfect short game.
SAIS features 21 different starship types, 69 different weapons, star drives, shields, shipboard systems and alien artifacts, 18 alien lifeforms, 17 different planet and star types and 7 different alien races.
SAIS's sequel, Weird Worlds: Return to Infinite Space features far more content and options, and is currently available for Windows and Mac.