3D Classics is a label applied to certain remakes of old games for the Nintendo 3DS, with added stereoscopic 3D functionality and updated features while retaining their original art style and graphics. So far, there are two (otherwise unrelated) series: a first-party series of NES/Famicom and arcade games, and a Sega-published, M2-developed set of classic Sega games, mostly from Sega Mega Drive/Genesis and Sega arcade hardware.