Artist: Linkin Park
Song: The Catalyst
Album: A Thousand Suns

Drop D
D-A-D-G-B-e

Great song.

Guitar starts at around 2:00

Update: Thanks to sguitar i fixed some of the chords. 

UPDATE: After listening to the the song more carefully I fixed all the parts
       and changed the tuning back to drop D.


Guitar starts at around 2:00


(2:00-2:12)

e|-------------------------------------------------------------------------|
B|-------------------------------------------------------------------------|
G|-7777777777777777\55555555/77777777--7777777777777777\55555555/77777777--|
D|-------------------------------------------------------------------------|
A|-5555555555555555\33333333/55555555--5555555555555555\33333333/55555555--|
D|-------------------------------------------------------------------------|


(2:13-2:38)

e|-----------------------------------------------|
B|-----------------------------------------------|
G|-55555555/77777777/99999999/10101010/12121212--|
D|-----------------------------------------------|
A|-33333333/55555555/77777777/8-8-8-8-/10101010--|
D|-----------------------------------------------|

e|-------------------------------------|
B|-------------------------------------|
G|-7777777777777777\55555555/77777777--|
D|-------------------------------------|
A|-5555555555555555\33333333/55555555--|
D|-------------------------------------|


e|----------------------------------------------|
B|----------------------------------------------|
G|-55555555/7777777/99999999/10101010/12121212--|
D|----------------------------------------------|
A|-3333333/55555555/77777777/8-8-8-8-/10101010--|
D|----------------------------------------------|


e|-------------------------------------------|
B|-------------------------------------------|
G|-1414141414141414141414141414141414141414--|
D|-------------------------------------------|
A|-1212121212121212121212121212121212121212--|
D|-------------------------------------------|


(2:39-3:25)

e|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-----------------------------------------------------------------------|
D|-12121212121212121212121212121212--1010101010101010101010101010101010--|
A|-12121212121212121212121212121212--1010101010101010101010101010101010--|
D|-12121212121212121212121212121212--1010101010101010101010101010101010--|


e|-----------------------------------------------------------------------|
B|-----------------------------------------------------------------------|
G|-----------------------------------------------------------------------|
D|-88888888888888888888888888888888--7777777777777777777777777777777777--|
A|-88888888888888888888888888888888--7777777777777777777777777777777777--|
D|-88888888888888888888888888888888--7777777777777777777777777777777777--|


e|-----------------------------------------------|
B|-----------------------------------------------|
G|-55555555/77777777/99999999/10101010/12121212--|
D|-----------------------------------------------|
A|-33333333/55555555/77777777/8-8-8-8-/10101010--|
D|-----------------------------------------------|


e|---------------------------------------------|
B|---------------------------------------------|
G|-1414141414141414141414141414141414141414~~--|
D|---------------------------------------------|
A|-1212121212121212121212121212121212121212~~--|
D|---------------------------------------------|


(4:21-4:58)
Only chord you play is:

e|------|
B|------|
G|--14~-|   Hold on final note.
D|------|
A|--12~-|
D|------|


The End.


Once again it's a great song and if you have any questions message me here on ultimate guitar.