Steve Jackson Games long running roleplaying magazine which replaced both Roleplayer and Autoduel Quarterly. It was originally a general SF&F gaming magazine in the tradition of SJG's old magazine Space Gamer, but the current incarnation is for GURPS Fourth Edition, with a fair amount of system-agnostic material.
"Volume 1" was a monthly print magazine that started in 1993.
"Volume 2" was a weekly on-line magazine that started in the late nineties. It is currently unavailable, following the closing of that service after 538 issues.
"Volume 3" is the current monthly electronic/PDF magazine available on Warehouse 23 that started in 2008. The current format is that each issue has a central subject, and the subjects rotate between fantasy, modern and futuristic themes.