No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $7.4K — a different platform, not this one.

Realms of Chaos

Realms of Chaos is an exciting side-scrolling platform game with an innovative mix of action, adventure, mysticism, and role-playing that's never been seen in this style of game. Set in the fantastic world of Mysteria, Realms of Chaos is the first of many adventures of Endrick and Elandra, a brother and sister duo who find themselves on a journey to save the many realms of Mysteria, from a dark, evil shadow that has engulfed their world, and has turned all of the inhabitants into fierce enemies. The story of the darkness is revealed as you finish each of the three game chapters. Each chapter, or episode, has three unique realms--each realm has new enemies, new graphics, new traps and new challenges. In all, 26 killer levels of classic VGA platformer fun! Play as two different characters: A male warrior with a devastating sword attack and extra stamina, and a female sorceress with a long range fireball attack and great leaping ability. Among all the amazing enemies you'll encounter, you'll also face four incredible bosses, plus one final super boss! Midi-music and digital sound effects by Bobby Prince, known for his award winning work in Wolfenstein 3-D, DOOM I & II, and Duke Nukem 3D.