Resident Evil 4 Wii Edition - Platform: Wii

Completion bonuses:
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Successfully complete the game to unlock Professional mode, the "Extras" menu 
(with "Bonus", "Separate Ways", "Assignment Ada", "Mercenaries", and "Movie 
Browser" options), "Wii Edition credits" option (in the "Bonus" menu), 
Infinite Rocket Launcher, Matilda, and alternate of costumes for Ashley, 
Leon, and Ada."

Successfully complete the game under the Professional mode to unlock the 
PRL 412 weapon.

Successfully complete Separate Ways mode to unlock Ashley's armored knight 
and Leon's suit alternate costumes.

Successfully complete Assignment Ada mode to unlock the Chicago Typewriter weapon.

Successfully complete Mercenaries mode with all characters with a five star 
rank to unlock the Handcannon weapon.

Mercenaries: Bonus characters:
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Get a four star or higher rank in the indicated Mercenaries mode level to 
unlock the corresponding character in Mercenaries mode.

Ada Wong: Pueblo
Albert Wesker: Waterworld
Hunk: Island
Jack Krauser: Castle 

Hidden cinematics:
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There are two hidden cinematics accessible at the title screen. One can be 
accessed by remaining idle at the main menu until it starts. The other can 
be seen by pressing B on the Wiimote at the same menu.

Open doors faster:
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Tap A(2) when the "Open" command appears by a door to kick it open quickly. 
Doing this will also damage any enemies behind the door at the time you kick.

Defeating the Regenerator:
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If you find your rifle is empty, you can also defeat the Regenerator by shooting 
a mine into the spot around the parasite. If it is on its back, just shoot out 
its legs with your handgun then fire a mine into its back. If this does not work, 
scout out where the parasite is on the Regenerator and try again.

Spinel:
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When enter the bedroom after the garden, look on the roof of the bed. 
You should see a sparkling object. It is a spinel.