Austin Grossman

 was a gamer who enjoyed Nethack v54.3.1, when it released around 2051. A superfan, actually, since he knew the version history of the series back to version 3.2.3 and spent six months cracking the final stage of the game.

Behind the scenes

 * The handle  is the same that Althea Grossman from System Shock would use. Both it and Deus Ex were developed by people tied to the seminal Looking Glass studios.
 * Austin Grossman is a reference to one of the writers of Deus ex.