Unlock Bitter Mode:
Complete the game once on Sweet or Mild.
Unlock Death match:
Complete the game once.
Unlock BJ5 Video:
Beath the BJ5 game then access the video from the TV menu.
Unlock E3 Trailer:
Beath the game then access the video from the TV menu.
Complete all Revenge Missions.
No More Heroes 1 mask:
If you have a savegame from the first game all your masks from that game will be displayed on the walls of your room