NESticle is an NES emulator, created by Icer Addis of Bloodlust Software. Released on April 3, 1997, the widely popular program originally ran under DOS and Windows 95. It was the first freeware NES emulator, and became commonly considered the NES emulator of choice for the 1990s. Initially offering few features and only supporting a handful of games, development proceeded rapidly and to expand usability such that NESticle is today credited with introducing the concept of recordable playthrough for emulation, as well as providing the capacity for users to create their own graphical hacks via an integrated graphics editor. In pioneering this heightened level of access for users, and providing the tools for fans to hack and remix familiar classics, NESticle has been credited by Spin Magazine as representing a milestone toward the development of video game music as a genre.
The source code for NESticle was illegally copied from Addis's computer by a code cracker named Donald Moore (also known as MindRape) of Damaged Cybernetics, who accessed its network shares with Samba. Because of the incident, Addis decided to discontinue NESticle. August 1998 saw the final NESticle release, version x.xx, and support for the emulator was discontinued.