Achievement Global Unlocks
Spawning Vats
Complete area fifteen.
4
Deimos Lab
Complete area twelve.
4
Deimos Anomaly, Pistol Start
Complete area nine from a pistol only start. [Hurt Me Plenty+]
3
Refinery Nightmare
Complete area eleven on NIGHTMARE! difficulty.
3
Deimos Lab Nightmare
Complete area twelve on NIGHTMARE! difficulty.
3
Tower of Babel Nightmare
Complete area sixteen on NIGHTMARE! difficulty.
3
House of Pain, Pistol Start
Complete area nineteen from a pistol only start. [Hurt Me Plenty+]
3
Dis Nightmare
Complete area twenty-three on NIGHTMARE! difficulty.
3
Dis
Complete area twenty-three.
4
Until It Is Done
Kill twenty enemies with the fist in one session.
4
Belts of Lead
Kill fifty enemies with the chaingun in one session.
6
Bio-Force Gun
Find a BFG.
4
Armed for War
Have 200% health and armor.
5
Toxin Refinery
Complete area three.
10
Toxin Refinery, Pistol Start
Complete area three from a pistol only start. [Hurt Me Plenty+]
8
Ol' Reliable
Kill fifty enemies with the shotgun in one session.
8
Plant
Complete area two.
12
Military Base Nightmare
Complete secret area twenty-four on NIGHTMARE! difficulty.
5
Phobos Anomaly
Complete area eight.
5
Deimos Anomaly Nightmare
Complete area nine on NIGHTMARE! difficulty.
3
Pandemonium, Pistol Start
Complete area eighteen from a pistol only start. [Hurt Me Plenty+]
3
Mt. Erebus Nightmare
Complete area twenty-one on NIGHTMARE! difficulty.
3
House of Pain Nightmare
Complete area nineteen on NIGHTMARE! difficulty.
3
Command Center, Pistol Start
Complete area thirteen from a pistol only start. [Hurt Me Plenty+]
3
Pandemonium
Complete area eighteen.
4
Command Control Nightmare
Complete area four on NIGHTMARE! difficulty.
3
Phobos Lab
Complete area five.
6
Computer Station Nightmare
Complete area seven on NIGHTMARE! difficulty.
3
Phobos Anomaly Nightmare
Complete area eight on NIGHTMARE! difficulty.
3
Computer Station, Pistol Start
Complete area seven from a pistol only start. [Hurt Me Plenty+]
5
Containment Area, Pistol Start
Complete area ten from a pistol only start. [Hurt Me Plenty+]
3
Refinery
Complete area eleven.
4
Refinery, Pistol Start
Complete area eleven from a pistol only start. [Hurt Me Plenty+]
3
Command Center Nightmare
Complete area thirteen on NIGHTMARE! difficulty.
3
Halls of the Damned, Pistol Start
Complete area fourteen from a pistol only start. [Hurt Me Plenty+]
3
Tower of Babel
Complete area sixteen.
4
Hell Keep
Complete area seventeen.
4
Hell Keep Nightmare
Complete area seventeen on NIGHTMARE! difficulty.
3
Pandemonium Nightmare
Complete area eighteen on NIGHTMARE! difficulty.
3
Mt. Erebus
Complete area twenty-one.
4
Unholy Cathedral
Complete area twenty.
4
Limbo
Complete area twenty-two.
4
Limbo Nightmare
Complete area twenty-two on NIGHTMARE! difficulty.
3
Limbo, Pistol Start
Complete area twenty-two from a pistol only start. [Hurt Me Plenty+]
3
Dis, Pistol Start
Complete area twenty-three from a pistol only start. [Hurt Me Plenty+]
3
Military Base
Complete secret area twenty-four.
6
Central Processing, Pistol Start
Complete area six from a pistol only start. [Hurt Me Plenty+]
5
Halls of the Damned Nightmare
Complete area fourteen on NIGHTMARE! difficulty.
3
Halls of the Damned
Complete area fourteen.
4
Mt. Erebus, Pistol Start
Complete area twenty-one from a pistol only start. [Hurt Me Plenty+]
3
Deimos Lab, Pistol Start
Complete area twelve from a pistol only start. [Hurt Me Plenty+]
3
Containment Area Nightmare
Complete area ten on NIGHTMARE! difficulty.
3
Containment Area
Complete area ten.
4
Plant Nightmare
Complete area two on NIGHTMARE! difficulty.
7
Phobos Lab, Pistol Start
Complete area five from a pistol only start. [Hurt Me Plenty+]
5
Central Processing Nightmare
Complete area six on NIGHTMARE! difficulty.
3
Deimos Anomaly
Complete area nine.
4
Spawning Vats, Pistol Start
Touch the final door of level fifteen with a pistol only start. [Hurt Me Plenty+]
3
Computer Station
Complete area seven.
6
Command Center
Complete area thirteen.
4
Tower of Babel, Pistol Start
Complete area sixteen from a pistol only start. [Hurt Me Plenty+]
3
Command Control
Complete area four.
6
Hangar Nightmare
Complete area one on NIGHTMARE! difficulty.
7
Plant, Pistol Start
Complete area two from a pistol only start. [Hurt Me Plenty+]
9
Hangar
Complete area one.
17
Command Control, Pistol Start
Complete area four from a pistol only start. [Hurt Me Plenty+]
5
Central Processing
Complete area six.
6
Toxin Refinery Nightmare
Complete area three on NIGHTMARE! difficulty.
5
Spawning Vats Nightmare
Complete area fifteen on NIGHTMARE! difficulty.
3
Hell Keep, Pistol Start
Complete area seventeen from a pistol only start. [Hurt Me Plenty+]
3
House of Pain
Complete area nineteen.
4
Military Base, Pistol Start
Complete secret area twenty-four from a pistol only start. [Hurt Me Plenty+]
5
Unholy Cathedral, Pistol Start
Complete area twenty from a pistol only start. [Hurt Me Plenty+]
3
Unholy Cathedral Nightmare
Complete area twenty on NIGHTMARE! difficulty.
3
Plasma Rifle
Kill twenty-five enemies with the plasma rifle in one session.
4
Rocket Launcher
Kill twenty-five enemies with the rocket launcher in one session.
4
Phobos Lab Nightmare
Complete area five on NIGHTMARE! difficulty.
3
Phobos Anomaly, Pistol Start
Complete area eight from a pistol only start. [Hurt Me Plenty+]
4
Rip and Tear
Kill twenty enemies with the chainsaw in one session.
4