Retribution is the second of the two authorized add-on packs released for StarCraft. The add-on was developed by Stardock and published by WizardWorks Software.
It was released for the PC in late 1998. The game is set during the second campaign in StarCraft, revolving around the acquisition of a crystal of immense power connected to the Xel'Naga. Divided into three campaigns, the player assumes the roles of a Protoss fleet executor, the commander of a Dominion task force and a Zerg cerebrate, all tasked with retrieving the crystal from a Dominion colony and getting it off the planet as quickly as possible. As with its predecessor, Retribution does not include any new gameplay features beyond its single player campaigns and an abundance of multiplayer levels. The add-on was not received with critical support, and instead was regarded as average but at least challenging. Retribution is not widely available, and Blizzard Entertainment offers no comment regarding support or the availability of Retribution despite authorizing the add-on.