New Systems

Nintendo DS
Nintendo Wii
PC
Playstation 3
Sony PSP
Xbox 360

Iphone

Older Systems

Dreamcast
Gamecube
Gameboy Adv
Gameboy Colour
Macintosh
Nintendo 64
Playstation
Playstation 2
Xbox

Other

DVD Eggs

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Cheat Codes:
During gameplay, hold Ctrl and enter any of the following "Codes":

Code - Result
hditech - Complete current research
hdilore - All technology
hdizooma - Unlimited zoom on/off
hdidizzy - Use ALT, UP, DOWN to control camera
hdiart - View animation data
hdirate - Add 40 to mall rating
hdicash - Accrue $100,000
hdimax - Editor on/off