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 $1.1K — a different platform, not this one.

Radical Rex

Come hang with Radical Rex. He's the raddest, baddest fire-breathing Tyrannosaurus ever to shred prehistoric pavement! This bad-boy-on-wheels is out to save the dinosaur race. Check Rex thrashin' on his board, sportin' his flame-breath, bustin' out with killer jump-kicks, swingin' on vines and blastin' out screen-shaking roars. Excellent! Slam through ten wild levels of jammin' jungles, freaked-out forests, haunted dino-graveyards, piranha-infested underwater caverns - and inside a giant dinosaur! Rex keeps you groovin' while you keep him movin' past twenty of the meanest prehistoric nasties to rock his dino-world. No sweet for Rex - 'cuz he's too hip to be extinct! Game Features 10 Levels set in prehistoric age 16 Bit Graphics Fast Paced Gameplay Catchy Soundtrack Great Enemies and Boss Fights