I am talking about Battlezone II, BZ1 is actually too old for my computer, lol.
I've heard lots of people saying that the first is better than the sequel, but i guess i can't tell. They look about equally intense.
BZ2 did have a tracked vehicle; the assault tank. It is pretty sweet, and can fire at riddiculous range. It also has some other interresting vehicles like the Mauler, an alien running tripod vehiclce that fires a shotgun-like laser.
Tile variation is pretty good in the second game, the worlds are very different from eachother, you have both jungle, ice, moon-like and sand-type of planets, and there is this one very nice map where you have to lead your recycler (main base/vehicle) across the ice without it breaking through, while enemies are attacking
You should really try it if you haven't, it has a great storyline.