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

METAL GEAR

OUTER HEAVEN is the name of a heavily armed land in the depths of southern Africa where the dreadful weapon called METAL GEAR is developed. It is the mission of SOLID SNAKE, one of the members of the secret army "FOX HOUND" to sneak into OUTER HEAVEN are destroy METAL GEAR. GO AHEAD SOLID SNAKE!