I've played a multiplayer asteroids game called Subspace Continuum (now on Steam) since 2001 (17 years). I probably have about 20k hours in that too. It is community run and has about 100 people playing at any time. It's a free game, so try it if this sounds like your thing.
What a great game! It worked so smoothly over dial up. I put a lot of hours into this back in the day. The balance in the ship types and the teamwork required is brilliant. And then all of the mods for different game types and maps... just so much fun.
