MechWarrior 4: Vengeance is a computer game developed by FASA Interactive and published by Microsoft. It was released on November 22 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 in 2001 and a subsequent stand-alone expansion MechWarrior 4: Mercenaries was released on November 7 2002.