IceFrog

IceFrog (born 1983 or 1984) is a pseudonymous video game designer, known for being the longest-serving designer of Defense of the Ancients (DotA), a custom Warcraft III: Reign of Chaos mod - and as the lead designer for the stand-alone sequel, Dota 2.
His involvement with Defense of the Ancients originally began in 2005, when he inherited the reins of the dominant variant entitled DotA Allstars from "Neichus", who himself inherited it from Steve "Guinsoo" Feak.

IceFrog is noted for his continued anonymity, having never publicly disclosed his actual identity. In February 2009, IceFrog revealed on his blog that he was 25 years old at the time. In 2010, an anonymous person who claimed to be a Valve employee wrote a blog post titled "The Truth About IceFrog", in which he claims that IceFrog had previously worked secretly on Heroes of Newerth for S2 Games before joining Valve, as well as stating his identity as Abdul Ismail.