Mob of The dead: Problem upgrading hell's retriever
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Hi everyone,
I'm new and tried to upgrade the hell's retriever in coop and couldn't do it. The thing is that I could but not my friends, we tried several times and it was always the same scenario. I was the host, we all got on the bridge, got only kills with the hell's retriever and only I got the sound of completing the step.
Could it be that only the host can get the upgrade?