This is the full retail version of Tribulation Forces which includes all of the missions from the original Eternal Forces game PLUS tons of new content. You do not need to buy the upgrade CD, but please update the game after installing by downloading the latest update from the Internet for free. This is the second chapter in the Left Behind PC Game series with massive improvements and new maps and missions.
Operating System: Windows ? XP SP1, Vista
Processor: 2.0 GHz Pentium ? IV
RAM: 512 MB
HDD: 4 GB
8x CD / DVD-ROM guide or quicker
Record Card: GeForce 4 MX440 32 MB DirectX9.0c supported, ATI Radeon 8500