First, you must have OpenArena (version 0.8.1 or higher).
Second, you need to get the Excessive Plus Mod. The preferred method is to download Excessive Plus 2.2b and extract the contents to your OpenArena directory (folder). Then from OA’s Main Menu, click “Setup” then click “Game Options” and set “Automatic Downloads” to “On.” This will allow you to get the great custom maps that E+ requires. You can set “Automatic Downloads” to “Off” once you have downloaded all the maps.
Alternatively, from OA’s Main Menu, click “Setup” then click “Game Options” and set “Automatic Downloads” to “On.” This will allow the Mod to be downloaded into its own directory (folder) within OA. It will also allow you to get the great custom maps that E+ requires. You can set “Automatic Downloads” to “Off” once you have downloaded the Mod and all the maps.
Finally, select “Mods” from OA’s Main Menu and then select Excessive Plus 2.0a. This will tell OA’s Server Browser to only list Servers that use the Excessive Plus 2.0a Mod. Enjoy the mayhem and shed some blood.
Note: Some people may wonder why “Auto Downloads” has to be turned on since E+ can operate in both Server-Side and Client-Side Modes. This is true, However, our Servers use mostly custom maps so this will require that you have AutoDownloads enabled (at least until you have all the maps).
The majority of OA’s standard maps are more suitable to regular OA (baseoa) and to Mods like CPMA. E+ maps need to have wide corridors, fairly large open spaces, relatively high ceilings/skyboxes, and preferably angled wall surfaces so that players can use their weapons to move quickly around the map and not get killed every 2 seconds because of the bad combination of cramped spaces and very powerful weapons.