MechWarrior 4: Vengeance is a computer game developed by FASA Interactive and published by Microsoft. It was released on November 24, 2000. This game 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 on October 31, 2001, and a subsequent stand-alone expansion, MechWarrior 4: Mercenaries was released on November 7, 2002.