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 $25.4K — a different platform, not this one.

18 Wheels of Steel: Hard Truck

The truck driving game that started it all: be your own boss behind the wheel of your big rig in SCS Software's first truck driving simulator. Bid on jobs, then hit the road to deliver faster than the competition. Road hazards, low fuel and even the police can affect the timeliness and condition of your deliveries—and impact your bottom line. It's all in a day's work when you're driving big rigs. Jump behind the wheel of 7 powerful trucks including monster 18 wheelers, flatbeds and tankers. Log thousands of miles as you travel actual US highways across the Desert, through the Mountains and along the Coast, with 15 cities to visit across 11 states. Bid on 16 cargo loads, weighing the hazards and payoffs of each delivery. Manage your cargo—overloaded or carelessly handled goods can slow your delivery time and reduce your payout.