Leagues of Adventure, the newest Ubiquity system game from Triple Ace Games.
Ubiquity is a bit more traditional than FATE, but has many manageable narrativist tools. I like it because it is very clean, simple, and fun to run at cons. It's a great gateway to systems like FATE.
Players can register and play in either Part One, Part Two or both!
Here are the two descriptions:
“Leagues of Adventure Marathon I: From London to New York, or The STEAM and the PUNK” TRACK: FRI 12-14 (12 noon-2 PM): A wealthy Southern gentleman crosses the Atlantic to recruit some of London’s greatest explorers for the adventure of a lifetime. You just need to get your hands on an airship to seal the deal. That and evade Confederate and Union assassins and get the airship across the ocean to wartime New York City. No problem, right? This is Part One of a two part game; play either or both parts!
“Leagues of Adventure Marathon II: Expedition to the Hollow Earth!” FRI 14-18 (2 PM-6 PM): You are on the adventure of a lifetime: a journey to the Hollow Earth! The rewards? Fame, fortune, and changing the history of science! All that and discovering a lost world of monsters and ancient civilizations! But there’s challenges. Everything from air pirates to beastmen to prehistoric creatures – as well as AMERICANS. Can you rescue the neer-do-well survivors of the previous expedition?