DCTonic was a compilation demo CD of independent Sega Dreamcast programs. It was handed out at E3 2001. The disc contained a preview of Ganksoft Entertainment's puzzle game Marbol, a demo of Cryptic Allusion's Tryptonite, a demo of Moving Target Software Designs' Cool Herders, and an updated version of Cryptic Allusion's Ghetto Pong. It also contained an MP3 player and a demoscene demo, Burritro, by AndrewK of Napalm.
The DCTonic demo CD was well received, and it even was reportedly mistaken for a professional demo CD.