We had the same impression. It probably made sense considering it’s post-apoc and you’re fighting demon type things in sewers and subways at the start.
Then suddenly everything was reminding me of Stargate, not Hellgate. :)
I have a couple friends who want to play this coop, so it’s going to be kind of tough holding off until our schedules align for a few hours each Saturday. I really want to dive back in and play some more.