Originally Posted by Gor1lla
I'm not sure about reloading checkpoints, but they carry over to NG+, so it should be possible.
Yes, you can just reload checkpoints and the kills will not be reset. I got the Impish Delight achievement this way. The only other one you might need to reload for is likely the Suck it Up achievement, but that one is completely random..
Anyway, how many people understood the achievement:
Should Have Called 555-2368…
Hint: Who you gonna call?