Aspyr has released a playable demo of popular turn-based strategy game Sid Meier's Civilization IV.

The 451.6MB demo puts players in charge of a human civilisation across a time span that includes the institution of the first settlement to the eventual creation of interplanetary travel.

The game offers a 3D environment and an updated user interface. It supports multiplayer games and customisation that lets players tweak the title for specific gameplay.

This title requires Mac OS X 10.3.9, a G5 or Intel Mac running at 1.8GHz or faster, 512MB RAM, and at least a Radeon 9600 or Nvidia GeForce FX 5200 graphics card with a minimum 32MB VRAM.