I got some more of the song tabbed but I'm just correcting it and i got one more fill to do.
Here are the main parts.
[ Tab from: https://www.guitartabs.cc/tabs/o/overkill/overkill_tab.html ]
|---------------------------------|
|---------------------------------|
|-----6-----7-----6-----7-----4---|
|-4-4---4-4---4-4---4-4---4-4---4-|
|---------------------------------|
|---------------------------------|
|---------------------------------|
|---------------------------------|
|-----4-----5-----4-----5-----2---|
|-2-2---2-2---2-2---2-2---2-2---2-|
|---------------------------------|
|---------------------------------|