Keep a Sentry Bot alive to its destination in DOOM 3, RoE, or Lost Mission (except Mars City)

Unlocked: 22 Oct 2012 00:51:10

Use the chainsaw to kill 20 enemies in DOOM 3

Unlocked: 22 Oct 2012 00:38:25

Get 2 demons to fight each other in DOOM 3, RoE, or Lost Mission

Unlocked: 22 Oct 2012 00:34:10

Blow up 50 barrels in the DOOM 3, RoE, or Lost Mission campaigns

Unlocked: 19 Oct 2012 20:14:33

Defeat the Vagary boss in DOOM 3

Unlocked: 17 Oct 2012 20:01:43

Kill the scientist trapped next to the Reactor Control Room in DOOM 3

Unlocked: 17 Oct 2012 19:40:28

Kill an enemy with 1 health remaining in DOOM 3, RoE, or Lost Mission

Unlocked: 17 Oct 2012 00:37:12

Complete the DOOM 3 single player campaign on Recruit

Complete the DOOM 3 single player campaign on Marine

Complete the DOOM 3 single player campaign on Veteran

Complete the DOOM 3 single player campaign on Nightmare

Collect every PDA in DOOM 3

Find all video logs in DOOM 3

Open all storage lockers in DOOM 3

Kill 20 enemies with the fists/melee hands in DOOM 3

Kill 2 Imps with one shotgun blast in DOOM 3, RoE, or Lost Mission

Score 25000 on Super Turbo Turkey Puncher 3 in DOOM 3 or RoE

Get the BFG-9000 from Security Chief's office in DOOM 3

Complete a level without taking any damage in DOOM 3, RoE, or Lost Mission (except Mars City)

Find the RAGE logo in the Lost Mission

Complete the DOOM 3 single player campaign in 10 hours or less

Defeat Guardian boss in DOOM 3

Defeat Sabaoth boss in DOOM 3

Defeat Cyberdemon boss in DOOM 3

Find the id logo secret room in DOOM 3

Find the bloody handiwork of Betruger (in Delta 4 Hallway) in DOOM 3

Use the Soul Cube to defeat 20 enemies in DOOM 3

Complete the RoE campaign on Recruit

Complete the RoE campaign on Marine

Complete the RoE campaign on Veteran

Complete the RoE campaign on Nightmare

Collect every PDA in the RoE campaign

Kill 5 enemies at once while in Hell Time in RoE

Defeat the Helltime Hunter in RoE

Defeat the Berserk Hunter in RoE

Defeat the Invulnerability Hunter in RoE

Defeat the Maledict boss in RoE

Kill 20 enemies with projectiles launched from the Grabber in RoE

Use the Artifact with Berserk ability to punch out 20 enemies in RoE

Complete the Lost Mission campaign on Recruit

Complete the Lost Mission campaign on Marine

Complete the Lost Mission campaign on Veteran

Complete the Lost Mission campaign on Nightmare

Collect every PDA in the Lost Mission campaign

Kill an enemy player by jumping into a teleporter after them in DOOM 3 Multiplayer

Catch an enemy player in the Reactor of Frag Chamber in DOOM 3 Multiplayer

Kill 5 enemy players while using Invisibility in DOOM 3 Multiplayer

Complete a DOOM 3 Multiplayer match without dying

Use Berserk to kill a player in DOOM 3 Multiplayer

Kill two enemies in the same room with a rocket in DOOM 3 Multiplayer