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

Collect every PDA in DOOM 3

Complete the DOOM 3 single player campaign on Nightmare

Find all video logs in DOOM 3

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

Kill 20 enemies with the fists in DOOM 3

Open all storage lockers in DOOM 3

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

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

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

Score 25000 on Super Turbo Turkey Puncher 3

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)

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

Find the RAGE logo in the Lost Mission

Defeat the Vagary boss in DOOM 3

Defeat Guardian boss in DOOM 3

Defeat Cyberdemon boss in DOOM 3

Defeat Sabaoth boss in DOOM 3

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

Use the chainsaw to kill 20 enemies in DOOM 3

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

Find the id logo secret room in DOOM 3

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

Use the Soul Cube to defeat 20 enemies

Complete the RoE campaign on Marine

Complete the RoE campaign on Recruit

Complete the RoE campaign on Veteran

Complete the RoE campaign on Nightmare

Kill 5 enemies at once while in Hell Time.

Collect every PDA in the RoE campaign

Defeat the Helltime Hunter in RoE

Defeat the Berserk Hunter in RoE

Defeat the Maledict boss in RoE

Defeat the Invulnerability Hunter in RoE

Kill 20 enemies with the 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 Marine

Complete the Lost Mission campaign on Recruit

Complete the Lost Mission campaign on Veteran

Complete the Lost Mission campaign on Nightmare

Complete any level in Ultimate DOOM

Collect every PDA in the Lost Mission campaign

Complete DOOM Episode 1 on 'Hurt Me Plenty' or higher

Complete DOOM Episode 2 on 'Hurt Me Plenty' or higher

Complete DOOM Episode 4 on 'Hurt Me Plenty' or higher

Complete DOOM Episode 3 on 'Hurt Me Plenty' or higher

Complete all DOOM levels on 'Ultra-Violence' or higher

Complete any DOOM level on 'Nightmare' in single player

Complete any DOOM II level

Complete any DOOM level with 100% kills, items, and secrets

Complete all levels in 'DOOM II: Hell on Earth'

Complete all levels in 'DOOM II: No Rest for the Living'

Find a BFG in DOOM II

Complete all 'DOOM II: Hell on Earth' levels on 'Ultra-Violence' or higher

Complete any DOOM II level with 100% kills, items, and secrets

Find a secret area of a DOOM II level