Originally Posted by Reel Big Mike
Besides finishing the campaign on Ultra Nightmare which I don't plan on doing (there's goes 1 completed game off my list), the only achievement I have left is the one for killing 2 guys with one railgun shot through a wall. I didn't see a good spot for it in my run through the DLC. I railgun killed 2 enemies with one shot who where behind chest high wall cover, but that didn't count. Anybody find a good spot to get this ach.?
You can do this at the Refinery, just after you get the Nailgun. Follow the path and look for a corridor to the right, wait for the one patrolling to stop next to his friends. Line up the shot and voila.