This group was involved in a long-standing war with a competing game pirating group known as MYTH. The two groups released strictly ripped games, as opposed to the CD image content released by groups such as Fairlight. Games would be split into the base rip, which would have as little content as possible to fully play the game; additional media (usually movies or digital music) would be released as add-ons. For some releases, intro movie add-ons were released as well.
They used advanced compression methods (most notably ACE) to reduce the size of the required downloads as much as possible; installers were specially crafted to use the abnormally compressed files. Many of their releases included a WAVE Injector/UHARC compression scheme, that decompressed and situated the files into a specific folder. These programs were at the core of their rip operation, as these programs (Wave Injector coded by CLASS/BACKLASH) are vital in decompressing the rips (i.e. games).
Around 1998 ATM (a class coding member) was developing a PC game called Scene Fantasy Legend similar to Nintendo isometric RPG style, however only a preview version were released in July to public. The game was never complete and only a beta version can be run.
When one group released a rip that was in some way flawed or unplayable, the other group was sure to pounce on this occurrence as a sign that they were more talented or reliable. Class stopped producing as of January 9th, 2004, by releasing an "endtro." This stated that after 1,234 releases they were giving up their "throne."