During GDC, gaming uber-blog Joystiq had the rather splendid idea of asking adventure game developers to solve their own "obnoxious" adventure-style puzzle. The victims were Ron Gilbert, Steve Purcell, Mike Stemmle, Eric Wolpaw, and Ragnar Tørnquist. Each solves the challenge - getting past a robot bear to enter a cave - in their own distinct style, and they're all worth a read. And then along…