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

Hyperspaced

Blast enemies, fight fires, clean up, repair, recycle and explore where no one has screwed up before! Team up and face swarms of foes as you pilot your way through procedurally generated galaxies. Save the Multiverse in Hyperspaced, a co-op space action game for 1-4 players!