DOOM – Unto the Evil is now available, offering the first DLC for id's first-person shooter. Bethesda.net celebrates the news with a new trailer from the add-on. Along with all the details they also announce a double XP weekend is now underway:

Unto the Evil includes the following:

• Three new multiplayer maps: Offering, Cataclysm and Ritual
• A new player-controlled demon: Harvester
• A new weapon: UAC EMG Pistol
• New equipment: Kinetic Mine
• New ways to customize your DOOM Marine, including additional armor sets, patterns, colors and taunts
• New hack modules

At QuakeCon, DOOM Executive Producer Marty Stratton announced a double XP weekend to coincide with the launch of Unto the Evil. Also coming soon is classic deathmatch, which attendees got to try exclusively at the show.