Both servers run the MOD SCTA. This MOD is strictly for server admins and is not required for clients. SCTA allows the admin to adjust many aspects of the game. The LinuxDude setup has removed 2 items from all maps and replaced them with items that make the game more fun for good players and noobies alike. It also eliminates the self-damage that a player sustains from perfoming "Rocket Jumps", similar to RA3. This means all players can use this feature of the Quake game and not just the players that have the Guard Rune.