Classic Battletech is an old favorite of my gaming group. A few years ago we flirted with the idea of a Battletech campaign using a variety of possible rules (Battletech A Time of War, Risus, Savage Worlds) but it never quite took off Instead most of our games have been one-shots at Nuke(m)Con or on game nights when we failed to reach critical mass for one of our RPG campaigns.
In prepping for my Saturday group's D&D 5e playtest I created a dragonborn paladin of Bahamut named Bharosh Goldenscales.
The group has been adventuring in the Wilderlands of High Fantasy and although this is mostly a mechanical playtest, I couldn't resist building out a backstory. That meant figuring out how the dragonborn might fit into one of D&D's oldest campaign settings.
After a few months of talking about the game, my monthly Saturday gaming group decided to give D&D 5th Edition a try. Rather than run a playtest campaign like the Blackrazors, our dungeon master is running us through a series of combat encounters at different levels. This lets everyone get a feel for the combat-centric rules and helps the DM get experience with encounter design.
It's a funny thing to sit down to write your next adventure in a campaign and realize that somewhere along the line it went from "campaign" to "long-running campaign".
That's what happened with Obsidian Frontier, a sandbox-style campaign set in the World of Greyhawk. We launched it as a playtest campaign for D&D 5th Edition in October 2014. Two years and thirty-four sessions later, the playtest is still running, and the campaign's still going.