[Shade667]

That achievement is the platinum trophy for getting all other trophies, so it shouldve unlocked after getting every other one.

On regards to slig reaction time, its unnaturally quick, but I dont think its a glitch. If you play stockyards on hard, the last slig u encounter (the one walking between the steam) will shoot almost before hes done turning around. But the difficulty says "Sure-shot sligs" before u select it :P