That's how you play the low gain mix (acoustic version), released in the deluxe edition as a bonus track.
It's played one and half steps down: Db Gb Cb Fb Ab Db
[Intro]
Bm - G - Em
[Verse 1]
Bm
Am I the son in or out of law
G Em
How many chances do I get before my head explodes
Bm
What's going on
What's going on
G Em
When I look into the mirror there's another gun
[Chorus]
G
When I tell you I'll be fine
Bm
I still want you by my side
A Em
Please just try to read between the lines
G Bm
Where's my comfort in the undefined
A Em
Please just try to read between the lines
Bm - G - Em
[Verse 2]
Bm
If I'm your son do you hear my call
G Em
Even if everything I touch will slowly turn to stone
Bm
What's going on
What's going on
G Em
When I look into the mirror there's another gun
[Chorus]
G
When I tell you I'll be fine
Bm
I still want you by my side
A Em
Please just try to read between the lines
G Bm
Where's my comfort in the undefined
A Em
Please just try to read between the lines
[Post-Chorus]
Bm D
What is the poison inside of me
A G
The sickness in my head
Bm D A G
Put me to sleep while I find a cure for the sickness in my head
(Final chorus)
G
When I tell you I'll be fine
Bm
I still want you by my side
A Em
Please just try to read between the lines
G Bm
Where's my comfort in the undefined
A Em
Please just try to read between the lines (x2)
Source: https://tabs.ultimate-guitar.com/tab/beartooth/the_lines_chords_1807458