Windows® System 98/ME/2000/XP OS: 
800 MHz or higher CPU 
256 MB or more of RAM 
32 MB 3D graphics card with hardware transform and lighting, such as GeForce 2 or better 
4 GB or more of available hard drive space 
DirectX® 9.0c or above 
A 56k or higher modem with an Internet connection 
4x CD-ROM drive 
Mac® System OS X 10.3.5 OS or newer: 

933 MHz or higher G4 or G5 processor 
512 MB RAM or higher; DDR RAM recommended 
ATI or NVIDIA video hardware with 32 MB VRAM or more 
4 GB or more of available hard drive space 
56k or higher modem with an Internet connection 
4x CD-ROM drive