#10RPGs — 5/10 Community — d20
There’s no one game I can point to here. 3e was the game that brought me back to the hobby, but it was the early d20 explosion that got me to join in the larger RPG community. Sure, I had been pretty active on Usenet, but it was ENWorld that actually put me in contact with other people in meatspace, got me into regular gaming groups that met for years and made me an organizer for the local Gameday. It also helped “train” me as a forum participant, paving the way for my later connection to the Forge.
Honestly, say what you want about d20 as a design, but there were some cool games getting made back then, and I’ve never seen a trad group more open to trying new games than I did when everything had a d20 logo.