 Dota 2 often features seasonal events that present players with themed game modes , which do not follow the game 's standard rules , including the Halloween @-@ themed <unk> event , the Christmas @-@ themed <unk> event , and the New Bloom Festival , which celebrated the coming of spring . In October 2015 , a Halloween @-@ themed " capture point " game mode was released , titled " Colosseum " . The move to the Source 2 engine in 2015 also saw the addition of community @-@ created custom game modes , with the more popular ones having dedicated server hosting by Valve . In March 2016 , Valve introduced the " Custom Game Pass " option to custom game modes , which allows content creators to add exclusive features , content , and other changes to their game mode , for a fee . 
