UPDATE:

In light of today's Doom teaser being released to the public, we thought you Doom fans would be served well by this piece from QuakeCon 2014. We got to see around 20 minutes of gameplay, and a surprising amount of info came out of it. Here it is for your reading pleasure!

Fast-paced combat against multiple enemies at once - Doom 3 this ain't.

Set outside a massive UAC research facility on Mars as it's being invaded by the forces of Hell.

Hellknights, cyberdemons, revenants, mancubii, and other classic monsters were spotted throughout the demo.

Classic Doom weapons, including the fan-favorite double-barrell shotgun return. Plasma rifle, rocket launcher, and the good old chainsaw were also shown off.

Go fast. "Doom is not about about taking cover" said executive producer Marty Stratton.

Doom is powered by IdTech 6, and will be for PC, PS4, and Xbox One. They are "committed" to 1080P at 60 frames-per-second.

Wonderfully gory close range executions, including special ones for dropping down on enemies from above.

Revenants now have jetpacks and can hover about while firing rockets at you.

At least one weapon, the combat shotgun, has an alternate fire mode, which allows you to charge up and release multiple shells in rapid succession.

Sprinting, double-jumping and mantling are all possible, making for very fluid motion during combat.

Enemies can teleport in for old-school style ambushes

Dying results in a crazy fatality scene depending on what killed you a la Dead Space. Revenants rip your arms off and punch straight through your combat helment.

Old school mechanics. No reloading your clip, hold as many weapons as you want, health and ammo pick-ups etc. NO REGENERATING HEALTH.

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At QuakeCon today, Id Software showed gameplay of the next installment in the Doom franchise, simply titled Doom, for the very first time after teasing it at E3 this past June.The game has been a long time coming, with it being first mentioned at QuakeCon way back in 2007 by John Carmack, id co-founder and then-lead developer for the company. Recording of any kind was prohibited at the event, but there was a lot of information to process during the 20-minute-long gameplay demo. Here are a bunch of the highlights:Executive producer Marty Stratton took the stage prior to the gameplay demonstration to introduce the philosophy of Doom, which is to be as true as possible to the fast-paced combat, and sense of power of the originals. He didn't call Doom 3 out specifically, but he made it very clear this was a return to Doom's roots. The word "origins" slipped out, though he didn't explicitly state Doom would be an origin story.No new details were shared about beta or release timing. Anyone who pre-ordered Wolfenstein: The New Order will have access to the beta for Doom, but no comment was made about when players might be able to start fragging quite yet.[ABOVE: Don't miss our awesome Let's Play Doom with original designer John Romero above. We played co-op through the first episode of the legendary first-person shooter, interviewing him about his experiences developing the game along the way.]Overall, it was a crowd pleasing presentation, one that made it very clear that Doom wasn't going to be changing with the times, but rather, going back to what made us love it in the first place, and I couldn't possibly be happier about that. For more on Doom as we hear it, stay tuned to IGN.

Vincent Ingenito is IGN's foremost fighting game nerd, but played an unhealthy amount of Doom, Doom 2, and yes, even Doom 3. F ollow him on Twitter , if you're into that sort of thing.