[E306 - Halo 3 trailer from The Microsoft Briefing]
The 2006 conference is on this list for several different reasons. Primarily, it was the conference in which the first line-up of memorable last generation console games were shown and discussed.
Microsoft had a particularly notable conference due to Halo 3, which was highly anticipated at the time and saw gameplay innovations like Forge mode, and the ability to save gameplay footage in Theater mode. During the game's first 24 hours of being released, more than one million players were on the game with Xbox Live. Halo 3's multiplayer was finely tuned, and the game holds a special place in my memories because of the individuals I met playing the game and the community experience that revolved around it.
Microsoft also showed a trailer for Lionhead's Fable 2, another anticipated sequel -- the first Fable being a notable RPG for its utilization of player choice in the story.
Nintendo's conference set a release date for the innovative Wii, with fantastic games like The Legend of Zelda: Twilight Princess, and Super Mario Galaxy. At the 2004 conference, many remember the first unveil of Twilight Princess, with Shigeru Miyamoto coming on-stage wielding Master Sword and Hylian Shield to the rallying cries of fans. This Zelda game featured innovative motion controls, arguably some of the best boss fights in Zelda history, and a darker story in nature the series hadn't seen since Majora's Mask.
Apart from Zelda, Super Mario Galaxy featured a new take on 3D platformers, allowing Mario to traverse planet-like platforms through space in full rotation. The game also featured a fully-orchestrated soundtrack that's almost reminiscent of Studio Ghibili style sounds.