The Mysterious 1STPAI

A secret hidden deep within Taiko no Tatsujin Wii 2, accessible only by the Taiko Team themselves and hackers who rip the disc and extract everything in it. On the surface, Taiko Wii 2 has 70 songs, but there's actually one more song deep in the program code. It isn't playable, cannot be unlocked, has completely no data. The only thing this creepy song has is an ID, '1STPAI'.

You'd be forgiven for not even calling it a song at all. It's a horrific, crazy mixture of footsteps (the same footstep sounds from Taiko DS3), screaming people, then followed by a remix of Wrath of Requiem and cackling noises, ending with the whole song rewinding on itself and the footsteps again. This is one nightmare-inducing song.

The voice in the middle repeats the same phrase 'youkai' over and over, and together with the footstep sounds, it is speculated that 1STPAI was intended as a teaser to the soon-to-be released Taiko DS3 (Dororon! Youkai Daikessen) for those who could work their way into the hidden corners of the Wii2 disc.

1STPAI. The horror.