No revenue estimate for EPIC — its rating/review counts don't calibrate to sales the way Steam's do. Reviews and prices only.

Viscerafest

Viscerafest is a Sci-Fi Fantasy Singleplayer Arena FPS with minor Collectathon elements. Fight through hordes of aliens and eldritch monstrosities wielding a slew of powerful weapons, juggling your resources, and exploring over 26 intricately designed levels.