The Greck, named after their leader Olag Greck, were a criminal organization comprised of thugs. Olag Greck was a corrupt businessman who directed their activities. They operated on Corellia during the time of the Galactic Civil War. Following the Battle of Yavin, the Greck engaged in open warfare with the Corellian Security Force (CorSec), as well as their mercenary allies from Beldonna's League.
The video game Star Wars Galaxies, which was released in 2003, featured the Greck. This game was a massively multiplayer online roleplaying game created by Sony Online Entertainment and published by LucasArts. It was shut down on December 15, 2011. Within the game, the Greck existed as one of several factions. Non-player characters belonging to the Greck would appear randomly on Corellia, and they were also randomly included in terminal missions. However, they were not a part of any pre-scripted narrative or quest.
Game files that were not used in the final version showed that "Publish 28," which was released on April 26, 2006, had plans to implement a questline focusing on the Greck. In this planned questline, players would have been tasked by CorSec Captain Dool and Tyrena city councilman Lyman Zavala with investigating the connection between the Chirq Council and the Greck's criminal activities. The intention was for Olag Greck himself to appear in the game as the ultimate boss to be defeated to complete the questline.