Talk:Fort Mercer

Hideout Completion Bug

I've finished the game storyline and I'm just trying to get the 100% completion done, unfortunately there appears to be a bug stopping me from completing the fort mercer hideout. I climb over the wall, kill everyone, including the three final guys, let the gunslinger in and go to the treasure room to open the chest. At no point do I get a Fort Mercer complete message though, any ideas? (this is on the PS3 BTW)