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 $4.7M — a different platform, not this one.

Worms Armageddon

Those intrepid invertebrates return with a vengeance in the much-loved Worms™ Armageddon. It’s a whole new can of worms! It’s hilarious fun that you can enjoy on your own or with all your friends.    Use over 55 weird and wonderful weapons and tools including Earthquake, Freeze and French Sheep Strike. Play single-player Deathmatch plus an exciting 40 mission campaign. Learn tactics using five special training modes including Sheep Racing, Crazy Crates and Advanced Weapon Training. Over 30 custom and comedy sound banks (including stiff upper lip, Cyberworms and more). New for multi-player mode: Handicapping (add or deduct energy for a team), Allied Teams (team up with others to target another player), ‘Worms Disease’, Home Runs and many, many more.