MechWarrior 4: Vengeance is a vehicle simulation game, developed by FASA Interactive and published by Microsoft. It was released on November 22, 2000. It is the fourth game in MechWarrior series. It takes place in BattleTech universe where the pinnacle of all war machines are huge, heavily armed robots called BattleMechs. The player pilots one of these "'Mechs" and uses variety of available weapons (autocannons, lasers, missiles, and more) to battle enemy 'Mechs, tanks and other vehicles. An expansion pack, MechWarrior 4: Black Knight, was released in 2001, and a subsequent stand-alone expansion, MechWarrior 4: Mercenaries, was released on November 7, 2002. Two smaller expansions, Inner Sphere 'Mech Pak and Clan 'Mech Pak, were also released in 2002. Plot The game takes place on the Inner Sphere planet Kentares IV and its moon. Players take control of Ian Dresari, son of famed Clan War hero Duke Eric Dresari and heir to the throne of Kentares IV. A civil war erupts on Kentares IV after William Dresari, Ian's cousin, betrays the family and seizes the throne under the banner of Katherine "Katrina" Steiner. Steiner is the ruler of the Lyran Alliance and responsible for the annihilation of loyalists to Victor Steiner-Davion, Katrina's brother. After a surprise attack by Steiner forces on the Dresari royal palace, leaving Eric Dresari and the majority of the royal family dead, Ian meets up with his uncle, Sir Peter Dresari, on the moon orbiting Kentares IV to launch a guerrilla campaign against Steiner. Ian fights alongside fellow Resistance MechWarriors, Casey Nolan, Jen McQuarrie, Jules Gonzales, and their commander Elise Rathburn, in various missions. The Resistance eventually leaves the moon and sets up camp on Kentares IV's arctic regions. At one point during the campaign, Ian's uncle Peter is murdered by Duncan Burke, a high-ranking officer in Katrina's forces. Ian and the Resistance are devastated by the loss and debate over whether or not to continue the fight for Kentares' freedom. They decide to push forward, capturing a satellite network from Steiner. The rebel group moves into the mountains. After destroying a disabled but heavily guarded Steiner dropship, Ian and the Resistance move to the Hadra Peninsula, a remote desert region. Rumors of an abandoned prison camp reach the Resistance and efforts are made to locate and liberate it in order to enlist more personnel for the Resistance. Ian is shocked to find that one member of