Sunset Kills

From the introduction:

Sunset Hills, Florida: A sleepy college town lucky enough to have its own indoor mall, zoo and minor league baseball team. Unfortunately, it’s also unlucky enough to be situated over the Shadowgate, a nexus of supernatural energies and a portal used by demons to enter our world. Thankfully, Sunset Hills is home to a small band of heroes willing to battle the monstrous forces that would take over the world. In this game, you play those heroes.