Warez groups are teams of individuals who have participated in the organized unauthorized publication of films, music, or other media, as well as those who can reverse engineer and crack the digital rights management (DRM) measures applied to commercial software. This is a list of groups, both web-based and warez scene groups, which have attained notoriety outside of their respective communities. A plurality of warez groups operate within the so-called warez scene, though as of 2019 a large amount of software and game warez is now distributed first via the web. Leaks of releases from warez groups operating within the "scene" still constitute a large amount of warez shared globally. Between 2003 and 2009 there were 3,164 active groups within the warez scene, with the majority of these groups being active for no more than two months and with only a small fraction being active for many years. The warez scene is a very competitive and volatile environment, largely a symptom of participation in its community being illegal in most countries. Groups are generally not driven by profit, but by reputation.
Hoodlum (also known as HLM) mainly focused on cracking games which utilized digital rights management solutions offered by Safedisc and Securom. They were targeted as part of the Operation Site Down raids in 2005. In July 2018, some group using the HOODLUM name resumed releasing unauthorized copies of games. 2b1af7f3a8