Matt Mercer DM Tips: How to Run an EVIL RPG Campaign! Zoltar 4 years ago See more New GM Tips, and a curious topic at that. 😉 https://t.co/pmP1OlqYJr — Matthew Mercer (@matthewmercer) December 8, 2016 Share this: Matt Mercer DM Tips: Write One-Shot RPG Campaigns!Matt Mercer DM Tips: Creating Homebrew Content in RPGS!Matt Mercer DM Tips – Building RPG Encounters!