During the step “Retrieve the second research team”, Agent Zrii failed to blow up the crates blocking the entrance. I am standing at the waypoint, but nothing happens.
The previous two steps listed are “Expand the search for survivors” and “Fend off the undead horde”, both of which are complete.
While reading this, I noticed the mention of a bone wall, which springs up after reaching the southern gate, after the retrieving the second set of researchers. In my game, this bone wall is already in place.
