Im not very good at writing tabs.. So Im just putting up the parts that I think are close.
Intro
Turn off sound pluck the harmonics and turn sound on.
D|---------------------------------------|
A|-7-------------------------------------|
F|-5-------------------------------------|
C|---------------------------------------|
G|---------------------------------------|
D|---------------------------------------|
A|----12\-21-1-1-121-1-1-121-1-1-121-1-1-|
Second Riff
D|-----------------------------------------|
A|-----------------------------------------|
F|-----------------------------------------|
C|-----------------------------------------|
G|-----------------------------------------|
D|-----------------------------------------|
A|-12\-21-1-1-121-1-1-121-1-1-121-2/4\2124-|
Main Riff (Play 4 times)
D|-------------------------------------|
A|-------------------------------------|
F|-------------------------------------|
C|-------------------------------------|
G|-------------------------------------|
D|-------------------------------------|
A|-21-1-1-121-1-1-121-1-1-121-2/4\2124-|
The next riff is something like this.
I cant think fast enough to get an exact order down
D|------------------------------------------|
A|------------------------------------------|
F|------------------------------------------|
C|------------------------------------------| 1's and 2's not 12's
G|------------------------------------------|
D|------------------------------------------|
A|-xx12xx12x1x2x2/4x2/4xx12xx12x1x2x2/4x2/4-|
Chorus (Play 6 times)
X's are Palm mutes and all other notes are hammer-ons
D|---------------------------|
A|---------------------------|
F|---------------------------|
C|---------------------------| 11's not 1's
G|---------------------------|
D|---------------------------|
A|-X8X8X8X8X8-X9X9X911X91190-|
That weird riff again.
[ Tab from: https://www.guitartabs.cc/tabs/m/mushroomhead/12_hundred_tab_ver_2.html ]
D|------------------------------------------|
A|------------------------------------------|
F|------------------------------------------|
C|------------------------------------------| 1's and 2's not 12's
G|------------------------------------------|
D|------------------------------------------|
A|-xx12xx12x1x2x2/4x2/4xx12xx12x1x2x2/4x2/4-|
Main Riff (Play 3 times)
D|-------------------------------------|
A|-------------------------------------|
F|-------------------------------------|
C|-------------------------------------|
G|-------------------------------------|
D|-------------------------------------|
A|-21-1-1-121-1-1-121-1-1-121-2/4\2124-|
D|---------------------------------------|
A|-------------------------------------7-|
F|-------------------------------------5-|
C|---------------------------------------|
G|---------------------------------------|
D|---------------------------------------|
A|-21-1-1-121-1-1-121-1-1-121-2/4\2124---|
Fill riff
D|---------------|
A|---------------|
F|---------------|
C|---------------|
G|---------------|
D|---------------|
A|-12\2p1X1h21h2-|
(Play 2 times)
D|--------------|
A|--------------|
F|--------------|
C|--------------|
G|--------------|
D|--------------|
A|-xx2\1x1h21h2-|
D|-------------|
A|-----------7-|
F|-----------5-|
C|-------------|
G|-------------|
D|-------------|
A|-xx2\1x-0----|
Fill riff again.
D|---------------|
A|---------------|
F|---------------|
C|---------------|
G|---------------|
D|---------------|
A|-12\2p1X1h21h2-|
(Play 2 times)
D|--------------|
A|--------------|
F|--------------|
C|--------------|
G|--------------|
D|--------------|
A|-xx2\1x1h21h2-|
D|-------------|
A|-----------7-|
F|-----------5-|
C|-------------|
G|-------------|
D|-------------|
A|-xx2\1x-0----|
Chorus (Play 8 times)
D|-------------------------------|
A|-------------------------------|
F|-------------------------------|
C|-------------------------------|
G|-------------------------------|
D|-------------------------------|
A|-12\-X8X8X8X8X8-X9X9X911X91190-|
I know its not perfect but its sumthin to point you in the right direction.