The Great Mami Tetris Apocalypse of '14 was a catastrophic event that occured on August 23rd, 2014. A togethertube chatroom was created by turtleseed users hentai and akemi to watch a video titled "Ow there's nothing left to do but tetris, is there!? a.k.a. Mami Tetris" that is an hour and 33 second long version of the Mami Tetris video, featuring Mami Tomoe from Puella Magi Madoka Magica. The duo had watched around 10 minutes or so of footage when turtleseed user NidaiNekomaru joined them, and the three watched he rest fo the video with occasional appearances from other users, but most of them left almost immediately.

Turtleseed user expressed concern over a mysterious blonde girl with blue eyes who appears in a vid stating "WHAT THE FUCK IS THAT". Much was discovered during that day about turtleseed users, butthe girl'sidentity was never explained. It is forever a mystery.

In this togethertube room, after many months, turtleseed user cookie was reunited with her brother, Nekomaru Nidai.

Soon, the video ended, and a new chatroom was made where up to 11 users joined to watch videos, and 8 hours later, many had left to rest, and NidaiNekomar was left with turtleseed user mel as the remaining two mods. Mami Tetris was replayed again, as a few more users (maru, AdachiTohru, felix, and nootnoot) played Tetris Arena with the two mods. Many died that fateful day.