You're back on Kentares IV, and this time, you don't have to play nice. Enlist in the notorious Black Knight Legion, climb aboard any one of five new 'Mechs, and deliver some payback for all the injustices you've been dealt. Put your mercenary skills to the ultimate test in a world ravaged by civil war. Use the new Black Market feature to get the equipment and weapons you need, when you need it.

Message from Microsoft Games Support
Microsoft Game Studios has made the decision to retire player matchmaking services for MechWarrior 4: Black Knight. We are proud to have hosted these services and would like to personally thank you for being loyal to our games. You will still be able to play your games and create matches within your game; however, matches will no longer be hosted by Microsoft Game Studios.

Best regards,
Microsoft Games Support