Great entry! I love the ambience that this game invokes, it does a fantastic job of setting the mood. My favorite part is the exploration that is inherent with this take on the theme. You explore the map a little at a time, and what you've already discovered goes back to hidden, so you have to make a mental map of the area and consult it whenever you encounter a monster. It works really well.
Had some issues on the final level with enemy pathfinding. Sometimes if ther view was obstructed of me (it seemed like), then they'd stop pathfinding and just stand there blocking the path and I'd have to kill myself to restart.