20 Best Ever E3 Moments

20. Microsoft Unveils Halo 2 (2003)

After the phenomenal success of the Xbox's flagship FPS Halo, fans were over the moon to see their first glimpse of the sequel at E3 2003.

And boy, the nearly nine-minute video - a combination of in-game cutscenes and gameplay - certainly suggested that Halo 2 was going to be a bigger, better sequel in basically every way.

It was a reveal that understandably brought the house down and ensured the game was on everybody's lips, even if that euphoria was sullied somewhat by skepticism from journalists that these dynamic visuals were actually achievable on the Xbox's hardware.

And, indeed, they were bang on the money - Bungie eventually realised they couldn't replicate these complex gameplay elements and sheer number of Things Going On, and so the sequence featured in the demo never actually made it into the final game.

All the same, if you're old enough to remember watching that gameplay demo during E3 week, it was a truly chills-giving moment.