Berserked! Achievement in Doom 3: BFG Edition
Use Berserk to kill a player in DOOM 3 Multiplayer
How to unlock Berserked!
Just like Ninja Killer, except this time you will only need to kill one enemy player while under the effects of the Berserk powerup.
Refer to the roadmap for the best and quickest way to boost all the online achievements and refer to step four of the roadmap to find partners for boosting them online.