Dungeons and Dragons turned 30 this week. I listened to the NPR story with some excitement - it also mentioned the GenCon kickoff, also this week. The story asserted that AD&D was "hugely influential" in defining how computer games, and MMOGs, look-and-feel today. There were a number of aspects to this claim: 1.) the "geek overlap" (programmers and AD&Ders); 2.) AD&D made palatable numeric models of behavior (percentile dice thing); 3.) cooperative (multi-)play; ... How much influence do you think AD&D really had?