The song is tuned half-step down, and Drop C# when you play power chords.
If you don't know how to play power chords, tuning half-step down is sufficient.
The picks however are still tabbed in Drop C# because it's easier to play that way.
The names of the chords are still in standard tuning, if you want the names of the 
chords half-step down you can use the transpose button on the left.

Throughout the whole song (power-)chords are strummed, except for the intro and first verses.
The pick patterns are:

  Intro
     Em               G        D             C                D
D#|----------------|----------------------|----------------|----------------------|
A#|----------------|----------------------|----------------|----------------------|
F#|----------------|--------------0-------|--------0-------|-----------0----------|
C#|--------4-------|--------7--------4----|-----4----------|-----4--------4-------|
G#|-----2----------|-----5----------------|--3-------------|--------5--------5----|
C#|--2-------------|--5--------5----------|----------------|--0-------------------|

  Verse
     Em               G                D                      C
D#|----------------|----------------|----------------------|----------------|
A#|----------------|----------------|----------------------|----------------|
F#|----------------|----------------|-----------0----------|--------0-------|
C#|--------4-------|--------7-------|-----4--------4-------|-----4----------|
G#|-----2----------|-----5----------|--------5--------5----|--3-------------|
C#|--2-------------|--5-------------|--0-------------------|----------------|

- Intro
Em    G  D  C      D     

- Verse
          Em            G
Take a breath, hold it in
         D          C 
Start a fight, you won't win
       Em          G
Had enough, let's begin
       D        C
Never mind, I don't care

        Em         G
All in all you're no good
      D               C
You don't cry, like you should
        Em      G
Let it go, if you could
       D             C       G
When love dies in the end

- Chorus (strum from here)
G                            D
So I'll find what lies beneath
D            Bm   Em
Your sick twisted smile
Em   D    Em  C
As I lie underneath
C          D    G
Your cold jaded eyes
G                          D
Now you turn the tide on me
D               Bm Em
'Cause you're so unkind
Em     D    Em   C
I will always be here
C               D  Em
For the rest of my life

- Interlude
Em    Bm    C     G  Bm

- Verse
         Em          G
Here we go, does it hurt
         D       C
Say goodbye to this world
         Em     G
I will not be undone
        D          C
Come to life, it gets worse

        Em        G
All in all you're no good
      D               C
You don't cry, like you should
         Em         G
I'll be gone when you fall
       D              C
Your sad life says it all

- Chorus
G                            D
So I'll find what lies beneath
D            Bm   Em
Your sick twisted smile
Em   D    Em  C
As I lie underneath
C          D    G
Your cold jaded eyes
G                          D
Now you turn the tide on me
D               Bm Em
'Cause you're so unkind
Em     D    Em   C
I will always be here
C               D  Em
For the rest of my life

- Bridge
Em              C
Don't carry me under
            Bm             Em
You're the devil in disguise
Em                C
God sing for the hopeless
        Bm               Em  D  C
I'm the one you left behind

- Chorus
G                            D
So I'll find what lies beneath
D            Bm   Em
Your sick twisted smile
Em   D    Em  C
As I lie underneath
C          D    G
Your cold jaded eyes
G                          D
Now you turn the tide on me
D               Bm Em
'Cause you're so unkind
Em     D    Em   C
I will always be here
C               D  Em
For the rest of my life

- Outro
Em    Bm    C     G  Bm
Em

Thanks to the Guitar Pro tab by tashriser!
http://tabs.ultimate-guitar.com/b/breaking_benjamin/
what_lies_beneath_ver3_guitar_pro_958181id_14062010date.htm