X4 : eXtreme Support Crew About X4 : eXtreme Warfare: The eXtreme mod is created by Wizard220. Back in the Call of Duty United Offensive days, he handed eXtreme over to Astoroth, who modified the mod to run on CoD2. The game was released October 10th 2005 and the first eXtreme+ modification was born October 13th 2005. The “+” indicated the beginning of a new exciting era. Astoroth has since “retired” from CoD modding and handed full reigns over to the extreme+ Support Crew. The first version of X4 : eXtreme Warfare was released 2008-01-01
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