My co-favourite video game of the 2010 PAX East in Boston was an odd but joyous multiplayer tower-building/battling game called SlamBolt Scrappers. The people who made that, Fire Hose Games, are showing their next game at the Penny Arcade Expo in Seattle this weekend.
The best game I saw at the last gaming convention I attended will be announced as a PlayStation 3 exclusive at the next one. OK, I had two favourite games last time. Slam Bolt Scrappers was one of them.