Beat the game on Hard and/or Ultimate, then enter the following codes at the title screen. If entered correctly, the word "Extra" will appear under the title name.
Effect Code Extra Costumes (After Hard Mode) L, R, L, R, A Play as an Alien Enemy (After Ultimate Mode) L, R, L, R, Z Play as President Weller (After Ultimate Mode) L, R, L, R, Start
Demo Select (Movie Cut-scene viewer) option
Complete the game (any difficulty) and go to Survival Mode (again, any difficulty). Defeat all 40 enemies in Survival mode - and after you beat it a menu appears letting you view any cutscene in any order. However once you exit this option you have to go through Survival mode all over again to get it back.
Unlockable How to Unlock Demo Select Defeat all 40 enemies in Survival mode
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Have We Been Fooled?
You can submit a problem report for any non-working or fake code in the lists above.