SpaceEngine
Steam: $29.99GOG: Free
Spellcaster University
Steam: $24.99GOG: $8.75
Spiritfarer®: Farewell Edition
Steam: $29.99GOG: $29.99
Star Control®: Origins
Steam: $19.99GOG: $19.99
Star Dynasties
Steam: $30.99GOG: $30.99
Star Explorers
Steam: $4.99GOG: $3.49
STAR FLEET II - Krellan Commander Version 2.0
Steam: $9.99GOG: $9.99
Star Hammer: The Vanguard Prophecy
Steam: $19.99GOG: $4.99
Star Trek: Starfleet Command Gold Edition
Steam: $19.99GOG: $19.99
Star Trek™ : 25th Anniversary
Steam: $19.99GOG: $19.99
Star Trek™: Judgment Rites
Steam: $19.99GOG: $19.99
Star Trek™: Starfleet Academy
Steam: $19.99GOG: $19.99
STAR WARS™ - X-Wing Special Edition
Steam: $9.99GOG: $9.99
STAR WARS™ Starfighter™
Steam: $5.99GOG: $5.99
STAR WARS™: Rogue Squadron 3D
Steam: $9.99GOG: $9.99
Stardew Valley
Steam: $14.99GOG: $14.99
Starlord
Steam: $6.99GOG: $5.99
Starmancer
Steam: $14.99GOG: $19.99
Starpoint Gemini
Steam: $13.99GOG: $29.99
Starpoint Gemini 2
Steam: $34.99GOG: $29.99
Starpoint Gemini 3
Steam: $29.99GOG: $29.99
Starpoint Gemini Warlords
Steam: $34.99GOG: $34.99
Stars
Steam: $14.99GOG: $7.49
Starsand
Steam: $19.99GOG: $19.99