11 June 2014
Last updated at 22:06 ET
It's an indisputable fact: E3 and Twitter are made for each other.
The Los Angeles event packs a conference centre with oversized stands showing off over-the-top gameplay and then unleashes it upon thousands of the most opinionated tech writers and video games chiefs on the planet.
Here's a selection of photos, fury, funny quips and even a few insightful thoughts posted online from those involved in this year's event.
Ubisoft has been criticised for not letting gamers play as a female protagonist in its French Revolution-set multiplayer title Assassin's Creed Unity. The firm says it planned a female character, but decided it would create too much extra work
There is a big focus on indies at this year's event as Sony and Microsoft seek to boost the number of titles available on their new systems. New games include Entwined, which was both announced and released for sale at the event
Quirky costumes abound at the event. Publisher Young Horses is promoting its Octodad sequel at this year's show, in which the lead character tries to hide his aquatic origins
World of Tanks has clocked up more than 85 million registered users. Its developer Wargaming.net announced at E3 that it planned to release a version of the game for tablets and smartphones later this month
Virtual reality isn't quite ready to go mainstream, but Facebook's Oculus VR team and Sony were showing off new games for their prototypes. The PS4-maker let attendees try out its Project Morpheus headset with Street Luge, a racing game involving a wheeled sled
It's a long time since Sega had a games machine of its own to show off at E3. But that didn't stop it being a big year for Sonic the Hedgehog. The firm is promoting a new video game starring its mascot and there are reports that a movie starring the character is in development
E3 allows many games journalists their first chance to try out unreleased titles. One of this year's "must plays" was Destiny, Bungie's first game since leaving the Halo franchise. Several writers compared its gameplay to the Borderlands series
Actors dressed as private military contractors promoting the next Call of Duty game made a change from the "booth babes" employed to attract attention to some titles
BBC's Richard Taylor stands next to a screen the size of a house showing Nintendo's new fighting game Super Smash Bros 4. The firm has floor space at the event but opted to announce new games via a pre-shot video rather than hold a press conference
Evolve - a game which involves four players teaming up to take down a monster, controlled by a fifth person - has attracted a lot of positive buzz at the show
There were lots of remakes announced at this year's event, as developers recode old hits for the latest generation of consoles. Michael Jackson's Moonwalker, however, did not make the list
Just Dance 2015 is one of the few games at E3 targeted at owners of motion-sensing cameras. Microsoft began selling a version of the Xbox One without its Kinect sensor on the same day E3 kicked off
Gaming news site Destructoid is among the hundreds of news organisations to deploy journalists - and a cyborg - to E3
Elite: Dangerous - a sequel to the 30-year-old BBC Micro game - is one of several titles on show to have been part-funded by a Kickstarter campaign
Nintendo's paintball-themed Splatoon allows gamers to play as either a human or a squid, continuing the firm's pursuit of innovative gameplay
About 50,000 people are expected to have attended E3 this year
The three-day E3 expo ends later this Thursday, but there will be more action at Cologne's Gamescom in August