Rip and Tear Achievement
Rip and Tear20
Complete any level on 'Nightmare' in Single player
Load up the very first level of “Hell on Earth” and run through it like the wind. At the start, turn around and get the chainsaw, it’ll help for running through enemies. Keep it revving throughout the entire level. Jump down and enter the hallway, take a right, keep going past the door on the left then take another right, then you’ll be in a brown room, take a left here, then keep going along that left wall and take one more left and there’s the finish room. Be careful, there will be an Imp in there waiting there.