The game is fun so far, but the map gives little to no help. With multiple locations and the actions not being intuitive (like the second time I played, I couldn't remember how to get a ladder to show up in the hole in the graveyard), there needs to be some sort of tracker for quests.
If your looking for a fun shooter but you have already played the main titles (like Doom) then I would definitely give this a go. Its got a good enough plot and a decent variety of weapons and enemies. It feels like a mix between Left4Dead and Survival Horror classics to me. Ammo scarcity, Inventory management, Horror feel, good plot with some mystery. So far the second part after you are in the canyon (the one in the swamp) is pretty challenging.