IceFrog is a game designer, known for being the longest-serving and current developer of the Warcraft III custom map Defense of the Ancients. He is currently employed by Valve Corporation as the lead designer for Dota 2, the stand-alone sequel to the original scenario, a position for which he was hired in 2009. IceFrog's involvement with DotA began in 2005, when he inherited the reins of the dominant variant entitled DotA Allstars from Steve "Guinsoo" Feak.