Listed here are some of the warez groups – groups of individuals specialized in cracking the digital rights management (DRM) applied to commercial PC video games – that were known to exist from the last decades of scene history, with an introduction of when they were formed and their achievements. According to a researcher between 2003 and 2009 there were 3,164 active groups, with the majority of these groups being active for no more than two months. Only a small amount is active for many years. The warez scene is a very competitive and volatile environment. The groups are generally not driven by profit, but by reputation.
3DM is a Chinese video game warez group, "one of the world's biggest" according to Kotaku. Their founder and leader is reported to be a woman using the pseudonym "Bird Sister" (simplified Chinese: 宿菲菲; pinyin: Sù Fēifēi). Unusual for piracy groups, 3DM's members have public profiles on the social network Sina Weibo, and use a blog to inform the public about their activities.
Centropy, founded in January 1999, was a warez group which specialized in the copyright infringement of films. Touting many "0-day" and "negative day" releases, Centropy has released and pre-released numerous films.
Crackers In Action (also known as CIA), founded in 2000 by tKC, using IRC to communicate
CLASS (also known as CLS) was a warez group which was the target of federal raids such as Operation Fastlink. They were a global group with members worldwide, often releasing "rip" games. The group ceased operations in 2004 after their 1,234'th release.
CODEX (also known as CDX) – is a warez group founded in the end of January 2014. They are known for cracking the games that are using Steam authentication and also for breaking the Ubisoft DRM protection. They were accused by SKIDROW group for stealing their code to write their own emulator for the game Trials Fusion, but later replied that they wrote it on their own. Currently they're one of the most active warez groups in the game ISO section.