Dropped D, dropped G tuning. Play this tab in full order, just follow it 
through. 
First 4 bars no bass.
Verse riff a          x8            
G-----------------------|
D*---------------------*|
G*--------10---10-10\--*|
D--5--(5)/--------------|
		    
Verse riff b     Fill
G---------------|--------------------------|
D---------------|-------------10-8h10p8----|
G---------------|--------10-------------0--|
D--5--3--3-3-4--|-5--(5)/------------------|

Verse b
(Verse a then Verse b) x5

Interlude
G------------|-----------|------------|
D------------|-----------|------------|
G------------|-5--3--3-3-|-5--3--3-3--|
D--5--3--3-3-|-----------|------------|

Verse b
Verse a

Pre-chorus
G-----------------|-----------------|----------------3----------------|
D-----------------|-----------------|------------3-5---5-3---3--------|
G-----------------|-----------------|----------------------5---5-3----|
D--5--5-5-5-5-5-5-|-5-5-5-5-5-5-5-5-|-5-3-3--3-------------------5--|

G------------------|-----------------|---------------------------------|
D------------------|-----------------|---------------------------------|
G------------------|-----------------|------------------5-4---4-4-4----|
D--5-5-5-5-5-5-5-5-|-5-5-5-5-5-5-5-5-|-5-3-3--3-0-(0)-----5-------5--|

G------------------|----------------|----------------|------------------|
D------------------|----------------|----------------|------------------|
G------------------|----------------|----------------|------------------|
D--5-5-5-5-5-5-5-5-|-5--5-5-5-5-5-5-|-5-3-3--3-3-3-|-3-3-3-3-3-3-3-3--|

Verse a
Verse b
Verse a

Chorus                                             
G--------------|---------------|------------|-----|
D--------------|---------------|------------|-----|
G--------------|-5--3--2-(2)-3-|------------|-----|
D--5--3--3-3h5-|---------------|-3--2-(2)-0-|-(0)-|

Main chorus riff                 x2 
G----------------|-----------------|
D*---------------|----------------*| Second time replace the last open D with 
G*---------------|----------------*| an F? (fret 3 on bottom D).
D--6--5--5-5-3-|-5-6-5-3--3-3-0--|

G------------------|-----------------|---------|------------|
D------------------|-----------------|---------|------------|
G------------------|-----------------|---------|------------|
D--5-5-5-5-5-5-5-5-|-3-3-3-3-3-3-3-0-|-3--2--0-|--3--2-2-0--|

Verse b
Verse a
Verse b
Verse a
Repeat (Verse a + Verse b sequence) 7 times. On the 5th time substitute the 
fill and after the last time play Verse a.

Main chorus riff x1

G--6-4h5p4-3-------|-----------------|---4---3-------|------------------|
D--------------5-3-0-|-3---------------|-----5---5-3-0-|-3----------------|
G--------------------|---5-4-3-----3---|---------------|---5-4-3-----3----|
D--------------------|---------5-3---5-|-5-------------|---------5-3---5--|

G--6-4h5p4-3-------|------------------|-----------------|------------------|
D--------------5-3-0-|-3----------------|-----------------|------------------|
G--------------------|---5-4-3-----3----|-----------------|------------------|
D--------------------|---------5-3---5--|-5-5-5-5-5-5-5-5-|-3-3-3-3-3-3-3-0--|

G----------|------------|
D----------|------------|
G----------|------------|
D--3--2--0-|--3--2-2-0--|

4 Bars of bass silence then
Bridge             x12 
G--------------------|
D*------------------*| On the 12th repeat gradually bend the 10th fret note on
G*--------10--(10)\-*| the G string one whole step. It sounds good if you do it 
D---5-(5)/-----------| slightly out of time with the guitars.

Main chorus riff x6
Main chorus riff x6 on the high D

Ending
G------------------|---4------------|-----------------|-4-3-------------|
D--5-5-5-5-5-5-5-5-|-5---5-3--3-3-4-|-5-5-5-5-5-5-5-5-|-----5-3--3-3-4--|
G------------------|----------------|-----------------|-----------------|
D------------------|----------------|-----------------|-----------------|

G------------------|---4-------------|---------|----------|---------|
D--5-5-5-5-5-5-5-5-|-5---5-3-3-3-3-0-|-3--2--0-|----------|-3--2--0-|
G------------------|-----------------|---------|----------|---------|
D------------------|-----------------|---------|-3--2-2-0-|---------|

G-----------|---------|----------|
D-----------|-3--2--0-|----------|
G-----------|---------|----------|
D--3--2-2-0-|---------|-3--2-2-0-|