I'm guessing this is the right board to post this, since it's a game. Anywho. Music to play Slender to:
X-files theme
Route 1 Pokemon R/B/Y Theme
Ghost Busters Theme
Tetris theme
Tchaikovsky: Sugar Plum Fairy
Earth Music (Bruce Faulconer- Dragon Ball Z)
There's a list. Feel free to add if you like.