19 achievements for 1000 Gamerscore
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Knee-Deep in the Dead
Beat all the levels in "Knee-Deep in the Dead"
75 Gamerscore
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The Shores of Hell
Beat all the levels in "The Shores of Hell"
75 Gamerscore
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Inferno
Beat all the levels in "Inferno"
75 Gamerscore
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Thy Flesh Consumed
Beat all the levels in "Thy Flesh Consumed"
75 Gamerscore
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I'm the Man!
Beat DOOM in under 2 hours
50 Gamerscore
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Rookie
Get 25 kills in deathmatch
20 Gamerscore
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Showstopper
Get 100 kills in deathmatch
50 Gamerscore
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Not So Bad
Beat every level on Nightmare in co-operative mode
75 Gamerscore
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Guns Are For Wusses
Get 25 kills with your fists in a single level
20 Gamerscore
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Groovy
Get 3 multi-kills with the shotgun
20 Gamerscore
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Shoot It Until It Dies
Finish off a Cyberdemon with the pistol
75 Gamerscore
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Cookin' With Plasma
Kill 5 enemies in 5 seconds with the plasma rifle
20 Gamerscore
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Overkill
Kill only a single enemy with a shot from the BFG
20 Gamerscore
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Timing Is Everything
Kill 2 enemies with a single barrel explosion
50 Gamerscore
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Doormat
Crush a corpse in a door
50 Gamerscore
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Untouchable
Finish a level with 200% armor and 200% health
50 Gamerscore
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It's a Secret
Find a secret level
50 Gamerscore
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Not a Very Good Secret
Find all the secret levels
75 Gamerscore
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Headhunter
Kill one of every enemy
75 Gamerscore