Enlarge / A shot from the trailer for Super Mario 64 Online, which has since been taken down from YouTube by a Nintendo DMCA request.

Nintendo has issued a number of DMCA copyright takedown notices aimed at hindering a popular mod that adds online play to a PC-emulated version of Super Mario 64, letting up to 24 players run around the game's world together as a number of different characters.

ROM hacker Kaze Emanuar says Nintendo issued takedown requests for several videos of Super Mario 64 Online gameplay on his YouTube channel. Those videos featured download links and instructions for installing the ROM hack, which have also been removed along with the videos.

The main video announcing the mod's launch had received more than a million views since going up early last week (an archived copy of that video is still up on IGN). Emanuar told Kotaku that "tens of thousands" of people were playing the game as of yesterday.

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