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 $89.9K — a different platform, not this one.

Serious Sam's Bogus Detour

Serious Sam’s Bogus Detour is an all-new action-adventure in the legendary Serious Sam saga from Hammerwatch developer Crackshell. Battle through beautiful Mediterranean locales, dangerous biological weapons labs and even high-tech moon bases as a one-man wrecking crew or in four-player online cooperative for maximum chaos! Dominate the chaotic Survival and Versus modes or make your own mods, modes, and even total conversions with the included game editor. Serious Sam’s Bogus Detour is the biggest little Serious Sam game ever made! Campaign Mode: Solo or 2 – 4 Players Online with Experience and Level Up Perk System Versus Mode: Deathmatch and More for Up to 12 Players Survival Mode: Solo or Up to 12 Players Full Mod Support: included with the game is a full-featured editor!