Syantides, the Sorcerer-King of Mur, had an artifact stolen from him by Prince Eyraen and a band of adventurers who then went into the Underworld on a quest for vengeance. That group, apparently, met with a TPK. But surely a second group of adventurers would be able to succeed where they failed, right? That's the adventure hook at the start of Operation Unfathomable, a new RPG adventure up on Kickstarter.
Originally created as an adventure for use at conventions and other one-shot events, Operation Unfathomable nevertheless turned into an entire adventure campaign. Since the original creation was never meant to go beyond a single session and have characters that more-than-likely would never be used again, it threw caution to the wind in terms of danger for the party as well as gave a blind eye to whatever sort of over-the-top equipment you might find along the way. However, the designers found that such games could be actually rather fun, and so expanded upon it until it got to where it is now.
So if you're a fan of old-school RPGs and some crazy stuff to happen in your games, it might be just the book for you.
The Kickstarter campaign's up and running now. They're already over their funding goal, and are actually closing in on 2x funded with still 28 days left on the clock.