Dragonstar: More than just D&D IN SPAAAACE!!!!
D&D in space. It’s an idea that has been around for a long while in the form of TSR/WotC’s Spelljammer.
However, a few years ago, Fantasy Flight Games produced an OGL supplement for a new kind of science-fantasy game. Thus was born the Dragonstar universe.
In a nutshell, the known galaxy, which theoretically includes any and all fantasy game worlds, is ruled by a council of dragons. These are the standard dragons of D&D fame, the Chromatic and Metallic breeds, and they follow the same alignment guidelines. The chromatics are generally evil, and the metallics are generally good.
Each breed takes a turn at ruling the Dragon Empire, alternating between the two factions. At the time the game is set, the Red Dragon Emperor is assuming the throne, and a dark era is descending.