Doom 2 - Refueling Base

This midi first appeared in DOOM, 
but its also DOOM II level 10, and 
some other levels.
song in the game.  Sounds dark too!!
 :)
e|-------------------------------
B|-------------------------------
G|-------------------------------
D|----4-3---5-4------4-3---2-0---
A|--2-----2--------2-----2-----4-
E|-------------------------------
e|---|    
B|---|    
G|---|    
D|---|    
A|0--|    
E|---| 4x 

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e|-------------------------------
B|-------------------------------
G|-------------------------------
D|----0-----1-0------0-----------
A|------4--------------4---3-1-0-
E|--3-----3--------3-----3-------
e|---|    
B|---|    
G|---|    
D|---|    
A|---|    
E|1--| 2x 

Repeat everything again (1st part 
4x, 2nd 2x)
Then first part twice followed by 
this:
e|------------------------------| 
B|------------------------------| 
G|------------------------------| 
D|----0-----1-0-----------------| 
A|------4------------2-1---3-2--| 
E|--3-----3--------0-----0------| 

Then everything repeats, only thing 
that changes is the octaves.