The granddaddy was 3025, followed. T 3056 - these were attenpting to portray the entire BT universe. So you’d sign up, join a faction, be assigned to a unit, train with your peers, and eventually go off to fight (though I don’t think either ever reached that point).

World level scenario based spinoffs started to appear. Planet level battles between multiple factions. Same deal as above except you would leave base with your unit to a shared hex map and could encounter other opponents.

All in all a much truer experience to TT than the MW games, but less so than Megamek