Berserker

The Berserker powerup in Doom 3 has a lot of things in common with its classic counterpart the berserk pack, but is on a timer this time, makes the player invulnerable in single player, and also enhances damage dealt by the flashlight. It also enhances the damage far beyond what the classic powerup did, enabling the player to kill even the toughest non-boss monsters with a single punch.

It is also notable for blurring the player's vision and causing the player character to constantly scream while its effects are in force.