Of course, I was the old Total Annihilation buff. I had a few mods on it, mainly adding up to 1000 units per side, and up to 10 players.
The most I played was 6 sides, each of us around 800 units each, with 200 en route to someone elses base. Those games lasted for around 5 hours, which were a blast!
Then we compiled a private epic build system on top of advanced that had mechs, berthas on wheels, and walking fusions. The doomsday device was a nuclear launcher that would, on impact, destroy a 22 screen radius of everything. When you're playing on Real Earth v2, which is 128x128 screens (at 1024x768) you need big skills.
None of this "click on buttons to make xp go bigger" or other gimmicks of these net games.