Xbox head Phil Spencer made remarks this week at the Tokyo Game Show that he has wanted to revisit MechAssault, the mech-based third-person shooter that was released for the first Xbox in 2002.
Mechwarrior 6 is about to release the Clan Invasion ... DLC? It might be a separate release technically. If you're interested in a more simulator-like experience.
You betcha. There's also Mechwarrior:Online, which is a separate game. Multiplayer battles with rankings and unlocks and stuff. I haven't tried it but the gameplay looks fun.