Sadly I didn't know Greg (other than a quick pinky finger handshake at the Gloranthancon in 1997 in Victoria, BC) but I certainly know and love his games. I've got shelves full of them in my basement and I've spent years playing Chaosium games, RuneQuest, Call of Cthulhu, Pendragon, Elric, and even Elfquest. In fact I just restarted a RuneQuest campaign I stopped running back in 2000 with the new rules and my gaming buddies haven't been this excited about roleplaying in a long time. Greg, your worlds and games are an inspiration and you shall be missed.
Many condolences to his family a