This is the song that plays in between levels from Doom. Enjoy!

( ) = palm mute

{intro, 'drum' part)

G|-----------------------|
D|-----------------------|
A|-----------------------|
E|----(0000000000000)----|


{Main riff} (x2)

|------------------------------------------------|
|------------------------------------------------|
|------------------------------------------------|
|-0--0--3-p0--0--0--2-p0--0--0--6-p0--5-p0--4-p0-|


|------------------------------------------------|
|------------------------------------------------|
|------------------------------------------------|
|-0--0--3-p0--0--0--2-p0--0--0--6-p0--5-p0--4----|

Then play the main riff twice more on the G string. Repeat.

Guitar with high distortion playing both E strings enters in at this time, as well.