Guile's theme: pause the game, hold the jump button and press in sequence: up, down, down, down; now the level's music will become that of Guile in Street Fighter. Enter the code again to return to normal music.
Mega Man without helmet: from the level selection, light up the Ryu icon, then hold down the attack button and press in sequence: right, right, right, left; in this way you can play with the protagonist without the helmet.
Hadoken at the start of the game: at the title screen, press and hold the attack and jump button for five seconds, you will hear a sound; when you start playing, you will notice that you have an energy bar for special shots, you can immediately launch normal hadoken by pressing quickly: down, down, forward and attack, to launch more powerful and faster hadoken instead hold down the attack button !
Exit date: December 17 2012