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 $2K — a different platform, not this one.

Crusade in Europe

Normandy, June 1944. An invasion force of more than 150,000 British, Canadian and American forces needs to be managed, and then their actions on the ground need to be coordinated in response to real-time events on the battlefield. The beginning of a true military crusade. Crusade in Europe is a classic real-time simulation game from the 80s designed by Sid Meier and Ed Bever. The first title in the "Command Series" of tactical wargames from Microprose, the game features real-time battles that test your skills as a commander. Five different scenarios, from D-Day to the Battle of the Bulge, recreate the tactical decisions faced by commanders in the European Campaign. Each has multiple variables, so you can create “what-if” scenarios, and different levels of difficulty. Accelerated real-time simulation Historically accurate scenarios Different skill levels Single player campaign Two-play head-to-head Choose to lead either side In-depth historical backgrounds and hints The idea for the Command Series came from observation of actual tabletop military scenario exercises. The games challenge you to manage assets, strategically place and move them around the battlefield map, and try to out maneuver the enemy. Victory requires careful strategic thinking and fast responses to rapidly changing battlefield conditions. Sid Meier, one of the most well-known and prolific strategy game designer-producers, collaborated with historian Ed Bever to make the games incredibly historically accurate.