Godzilla Unleashed - Platform: Wii

Cheat mode:
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Press A + Up to display the cheat entry screen. If that does not work, 
successfully complete a character's story, and go to continue. Then, skip the 
animation and hold A.

Mutant faction:
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Successfully complete Story mode to unlock the Mutant faction for purchase at 
the shop for 15,000.

Mothership area:
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Shoot down the ship in the "Invasion" level at San Francisco. You can now select 
the Mothership as an area for purchase at the shop for 35,000. Alternately, play 
as the Alien faction. You can select the Mothership after another faction shoots 
down the ship.

Alternate ending:
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To view an alternate ending as any of the Earth Defenders or GDF monsters, get 
all seven Power Surges. You will get the "Tyrant" ending instead of the "Hero" 
ending once you successfully complete Story mode.

Easy points:
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Start a two player battle in Brawl mode. You will earn as much as 1,000 points 
to spend in the store. This helps unlock more characters faster than playing 
through Story mode multiple times.