l0rdtr3k: Didn't played any of those games. Are they good?
Myth TFL and Myth 2 were some of the best (if not the first) fully 3D RTT games (well, the terrains were 3D, but the units were 2D sprites). At the time they really pushed the boundaries due to both the physics engine and the deformable terrain, and they really shined on the top-end 3Dfx hardware of the day. It was one of those few examples of a game that was very well balanced for both multiplayer and single player, too.
If you can find a physical copy of the game, do so: thanks to Project Magma's work with the source code, both Myth TFL and Myth 2 are very well supported on modern hardware and OSs. This was Bungie Software at its best in its days before Halo.