Me personally, I think this is Ed Boon’s greatest contribution to gaming.
Take Unreal Tournament or Quake 3, give it an wilder number of weapons, and characters with special abilities and you have The Grid. And yes that is the Announcer from Smash TV.
I loved this game. I played it to hell and back, and I cannot believe it was never ported and there has been zero documentation on any attempts at emulating it. A sad day. But my hope is to recreate the game in Mod form.