Pros:

- Excellent level design.
- Some good adrenaline pumping      spots.
- Great story concept.
- Totally replayable.
- Found it challenging.
- Spooky !

Cons:

- The ending was confusing.
- Bots got stuck in areas.
- I was ready to shot Bill in the face if, he said COVER ME ! One more time !
- Music screws up once and awhile.

Conclusion:

All in all a great campaign ! I would have given it a 5/5, except for the ending. When I finish my campaign I can only hope it half as good. I would highly recommend it !