Quakecon is the annual gathering of id Software fans and, as of recently, of Bethesda/Zenimax/Arkane fans as well.
It took place in the Hilton Anatole hotel near Dallas Downtown. You have developer talks, booths from hardware and game vendors, a giant LAN party, all kind of game inspired Cosplays, Master Pancake and so on.
More photos from
Quakecon 2015 in Dallas
Quakecon 2013 in Dallas
Quakecon 2012 in Dallas
Gearbox Community Day 2011 and Duke Nukem Forever launch in Dallas
Gearbox Community Day 2013 in Dallas

Quakecon 2011 - players at lan party in monitor light

Quakecon - Kids playing at the lan party

Quakecon 2011 - Empty stage before Zenimax presentation

Quakecon 2011 - Todd Hollenshead and the girls

Quakecon 2011 - Girl playing at the lan party

Quakecon 2011 - portrait of Raphael Colantonio

Quakecon 2011 - group of players talking

Quakecon 2011 - waiting in line for the BYOC lan party

Quakecon 2011 - reporters interviewing a girl player

Quakecon 2011 - players at the BYOC lan party

Quakecon 2011 - Hollenshead, Willits, Cloud, Carmack talking

Quakecon 2011 - room full of people at Skyrim demo by Bethesda

Quakecon 2011 - players playing Rage

Quakecon 2011 - Webb, Willits and Hollenshead on stage

Quakecon 2011 - Harvey Smith talking at panel

Quakecon 2011 - empty chair on stage before demo

Quakecon 2011 - fan boy costumed

Quakecon 2011 - Rage truck on showroom

Quakecon 2011 - fluorescent modded PC

Quakecon 2011 - interview of a fan with sword

Quakecon 2011 - USAF modded PC

Quakecon 2011 - costumed girl question at panel

Quakecon 2011 - gamer girls playing on showfloor

Quakecon 2011 - Todd Howard presentation of Skyrim

Quakecon 2011 - room full of computers lan party

Quakecon 2011 - Panorama of Webb, Hollenshead, Willits, Cloud, Carmack