Here's the official description of each:
Fans in attendance will have the opportunity to join Bethesda Game Studios’ Game Director, Todd Howard, for an exclusive QuakeCon presentation of Fallout 4 – taking place on the Ventrilo Main Stage on Friday, July 24th at 1pm.
On Saturday, July 25th at 3pm, join members of id Software’s development team as they take the Ventrilo Main Stage for a special panel discussion on their upcoming first-person shooter, DOOM.
The Elder Scrolls Online: Tamriel Unlimited | Imperial City and Beyond
Developers from ZeniMax Online Studios will be on hand to share what’s next for The Elder Scrolls Online: Tamriel Unlimited. Come see what to expect next for the game with on the Ventrilo Main Stage on Friday, July 24th at 4:30pm.
QuakeCon 2015 will take place in two weeks, from Thursday, July 23, to Saturday, July 25. Those interested in attending can pre-register at the official QuakeCon website. Those who can't will be able to follow along on the show's official Twitch page.