With the combined efforts of several Milohax users, including LocalH, Mariteaux, JNack, and GenericMadScientist, as well as assistance with tools several programs from PikminGuts92, Onyxite, Dwitt, and Ryan Lesser, Guitar Hero II Deluxe was born. This strum limit was one of the most notorious issues with Guitar Hero II, as it made the song ' Trogdor' impossible in the NTSC region on PlayStation 2, and completely impossible without exploits on the Xbox 360 version. On March 20, 2021, a user in the Milohax Discord server by the name of GenericMadScientist announced that he had discovered a way to remove the infamous strumming limit in Guitar Hero II.
Super Guitar Hero II had a few demos made to showcase the looser engine and song speeds, but was ultimately never finished. Guitar Hero II Deluxe began development as Super Guitar Hero II, another Milohax project made to add certain features, such as focus mode and song speed modifications, to Guitar Hero II.
