Zackasaurus-rex on 20 May 2015
From the E3 site:
"Welcome to Attendee Registration. Please note that E3 is a trade-only event and is not open to the general public. Individuals who are not able to document their direct, and current professional affiliation to the interactive entertainment industry are not qualified to attend. If you are from the retail sector, you must be able to provide documentation that verifies that you are responsible for company purchasing."
So you are ~probably~ out of luck.
