Photos: 2015 Electronic Entertainment Expo

The E3 atmosphere this year is not unlike Comic-Con with actors dressed as zombies, and “Star Wars” Stormtroopers and a Mario brother walking the floor and posing for pictures. Above, an E3 attendee at a display for “Halo 5: Guardians.”

Large crowds file into the L.A. Convention Center on Tuesday, the first day of the three-day E3, the video game industry’s most important annual event. An estimated 48,000 people are expected to attend.

A gaming enthusiast takes a selfie with zombies advertising Overkill’s “Walking Dead” video game at E3.

An E3 attendee records Stormtroopers posing with fans at E3. Electronic Arts plans to release “Star Wars Battlefront” on November 17.

E3 tickets are not available to the public (a three-day pass for exhibitors costs $995). Up to 5,000 video game fans were selected to attend by exhibitors, who were allotted a certain number of tickets by E3 organizers.

A large crowd of video game enthusiasts fill the Xbox game booth to try out new games during the first day of E3.

Evan Thorogood, 22, of Alberta, Canada, one of several thousand expert gamers invited to attend E3 this year, is recorded by a gaming blogger as he plays “Forza Motorsport 6” during the first day of the convention.

The character Joy from the Disney movie “Inside Out” is used as the main character by a gamer playing “Disney Infinity 3.0 Edition” on an Xbox system during the first day of E3.

Aryel Abrahami plays the “Disney Infinity 3.0 Edition” video game at E3.

Jeffrey Monticelli, a community manager with PlayStation in San Mateo, Calif., checks out the PlayStation StarWars Battlefront Xwing Experience at E3.

Rafael Brown plays Nintendo’s “Star Fox” game on the Wii U console at E3.

Game enthusiasts wait in line to play Nintendo’s “Star Fox’ game at E3.

E3 attendees walk past the Microsoft Xbox booth.