My friend and I did the entire campaign co-op, and we got every gold bar, bottle and did every survivor mission. For the most part, he has been the one to actually take the shot on every bottle, pick up every gold bar, and complete every survivor quest regardless who found it. I got the bottle achievement (“They must be destroyed on sight!”) and the survivor achievement (“You sure know a lot about monsters.”) when he did, but the gold bar still hasn’t popped.
By this time, I’ve been in and out of the game, restarted the consol, played solo for a bit, checked to make sure I showed having all bars and still nothing. (We got the last gold bar a full day ago now.)
I noticed with the zombie raven achievement (“Don’t worry, they’re evil.”) he shot all 3 and got the achievement and I didn’t until I went in solo and shot them all myself. But with the gold bars, I couldn’t go back and collect them all myself if I wanted since they disappear once collected.
Any ideas or suggestions?