This patch is for Doom 3 Evolution Revision 2.1. You will need the original version of the mod ( not the old versions ) which you can get from "Downloads". This patch will fix a number of bugs and change some of the features of the mod. Due to all the changes I've made you will have to start the game from the begining when you install the patch. Saves will work but I can't guarantee all the features will work properly. To install it - please refer to the "readme" file.