Just thoght how big reguirements will Civilization IV need.
RAM?
VIDEO CARD?
PROCESOR?
Hope they won't be too high but also not too low.

my guess?
Ram: 128 Required, 256 reccommended
Video card: 16 mb direct x 8-9, 32 mb reccommended
processor: required 350 mhz, reccommended 600 mhz
disk space: 350-500 required, 1-1.5 gig reccommended

3d games take up lots of space...