If you aren't playing it already, the Doom open beta kicked off at midnight this morning and will continue through Sunday, April 17. You won't need a key this time as you did for the closed beta.
In the open beta, players will have access to Team Deathmatch and Warpath on the Heatwave and Infernal maps. And if you like the idea of playing the demon, you will get to test out the Revenant in all its glory. The weapons available will be the rocket launcher, plasma rifle, super shotgun, vortex rifle, static rifle, heavy assault rifle, and lightning gun. The gauss cannon is available as a power weapon (limited use), and frag grenades, personal teleporters, and siphon grenade will be the equipment that can be used.
When the game is released on May 13, the Baron of Hell, Prowler and Mancubus will also be playable, while the BFG 9000, and chainsaw will be added to the arsenal of power weapons. Additional multiplayer modes will be Soul Harvest, Freeze Tag, Clan Arena and Domination, while seven more multiplayer maps will be added as well.