The Main Riff is: 

e|--------------------------------------------------------------------------------------------------------- 
B|--------------------------------------------------------------------------------------------------------- 
G|--------------------------------------------------------------------------------------------------------- 
D|-----------------------------------10-------------------------------------------------------------------- 
A|--------3-3------5-5------8-8---------10----------------------------------------------------------------- 
E|----1-1--1---3-3--3---6-6--6---8-8---8------------------------------------------------------------------- 

The Chords used are 

e|--------------------------------------------------------------------------------------------------------- 
B|--------------------------------------------------------------------------------------------------------- 
G|--------------------------------------------------------------------------------------------------------- 
D|-----3333--5555--8888--10101010-------------------------------------------------------------------------- 
A|-----3333--5555--8888--10101010-------------------------------------------------------------------------- 
E|-----1111--3333--6666--8888------------------------------------------------------------------------------ 

The Last chord is just a power chord on the 8th Fret of the E. 

The bass is just the root notes of the Chords.