It's by the same devs as Alan Wake and has an Alan Wake tie in DLC since they take place in the same universe. It's fairly linear with some optional side missions. The setting is similar to SCP if you're familiar with that. You're in an office building dedicated to an organization that contains extra-dimensional threats and there's been a breach that has to be contained.
Story is pretty straight forward but there are some humorous notes and videos you can find that help explain the primary story and some of the objects that are being contained in the bureau.