Inspired by and vaguely similar to. Widgets (usually those gray domes) would be placed on a map that may or may not look like, say, Europe, and you'd have N players whose goal was to possess (own structures by) as many of them as they could manage. Structures were usually super expensive, and resources (or, in some versions, units themselves) were acquired only by owning those control points. No allied victories.
Once the balance was dialed in (lots of maps had nation-specific special units and stuff, which made it tough), it could create some of the most interesting, dynamic UMS games I ever played. Sometimes they'd go literally hours. Early land grabs followed by huge back-and-forths, usually only limited by the sprite limit (my own maps avoided sprite-y units like Carriers, Goliaths, and Valkyries because of it; lots of Marines and Firebats, trying to make them feel like Diplomacy "armies" that could plausibly bounce off one another).
The only games I can recall that were more fun were Last Man Standing Regicide ("Shimo-style") games in Age of Empires II.
