Double Dragon IV Cheats...
Abobo and Burnov
Complete Mission 6 of Story Mode.
Casey and Shannon
Beat Floor 25 in Tower Mode.
Chin Taimei
Complete Mission 7 of Story Mode.
Cody
Complete Mission 5 of Story Mode.
Double Dragon 1 Jimmy Lee
Beat Floor 35 in Tower Mode.
Jake and Ashida
Complete Mission 12 of Story Mode.
Kodani and Jake
Complete Mission 10 of Story Mode.
Level Select
After you beat a mission, you can select it by pressing Option on the main menu. You should see the mission number in the bottom right corner.
Linda and Linda M.
Complete Mission 3 of Story Mode.
Mason
Complete Mission 4 of Story Mode.
Mysterious Warrior
Beat Floor 40 in Tower Mode.
Right Arm
Complete Mission 8 of Story Mode.
Rowper
Complete Mission 2 of Story Mode.
Sonny, Chin Seimei, and Yagyu Ranzou
Beat Floor 30 in Tower Mode.
Tower Mode
Complete the game by defeating the boss in Mission 12 to unlock the survival mode called Tower.
Williams
Complete Mission 1 of Story Mode.
Yamazaki and Soeno
Complete Mission 9 of Story Mode.
