An excellent collection, and the story mode connecting it all was great too.
Night Shift was very well paced; capturing the unique mix of anxiety and boredom of being stuck alone somewhere overnight. I liked the menial tasks, too - it was oddly satisfying to restock the shelves and sweep the floors.
I didn't enjoy Spiders quite as much as the other games because it lacked a bit in atmosphere. I didn't manage to survive past wave 2 or 3 so I'm not sure if it develops more later.
Feed Me Billy was a very well-crafted experience - everything from the killer's heavy breathing to the softcore porn on his TV works together to conjure up the image of a depraved sadist straight out of a slasher flick, and the murders are both brutal and gleeful.
The Riverside Incident is probably one of the most intensely unnerving games I've ever played - the visuals are perfect for that 'found footage' style and the slow movement speed really amped up the trepidation of exploring such a creepy place.