Posted by: Arbiiiter
And just for future reference, if I do happen to kill one, will a progress meter pop up, like most other achievements? Also, If I do accidentally kill one, can I start over from my last checkpoint to undo that? Thank you for the help so far, and sorry about bothering you for these last two questions for clarification.
Yeah, about that, I accidentally killed an engineer and it did show it on the progress meter...HOWEVER...I reverted to last save, and took a side path to avoid him. I got past him and was able to start a level, and did not see a progress meter pop up at all. However, I am still not too sure if that counted even after I reverted.