Mech Warrior 3 - gamefront.com

It is the twilight of the Clans. The Inner Sphere’s massive counterstrike against the vicious Smoke Jaguar Clan rages on, but victory is elusive.
Your mission: conduct a high-impact commando raid on one of the last Clan outposts – and possibly break the back of the Clans forever.
But be warned, MechWarrior, for you face the battle-hardened elite of a once superior force. In this, their last stand, it is YOU who risk extinction!