Fear has new meaning...
When I started playing I found it rather mundane. Admittedly the Slow-Mo was kind of cool but there didn't appear to be any horror aspect to it.
That's when I began the actual first mission and watched as my team was reduced the ashes by the hands of a little girl, but that was just the beginning. The further I went in the game the more horrors I discovered. Whether it was a brief appearance while I was crouched and helpless in the ventilation system or discovering the mutated bodies of Replicas and ATC alike I felt a pleasurable adrenalin rush and even, every now and then, fear.
Not the best horror title ever but a very interesting game with a good plot.