If you saw footage of Exterminauts come out of Gamescom this week, then you might have thought it bore some resemblance to Helldivers 2. The two games are both cooperative PvE shooters with an assortment of powerful weapons to use and creatures to battle, but the team at Behaviour Interactive believe Exterminauts stands out in several key ways. Speaking to GameSpot at Gamescom, creative director Vincent Regimbart acknowledged that there are definitely similarities in the two games, but also a…