If you like the Half-Life, Bioshock, and F.E.A.R. series, horror and military shooters in general, and have a nack for depressing, sometimes confusing (duh.) time-travel stories involving a pony, this fine "best of" remix is for you.
The story isn't spectacular per se, but it does a great job of keeping you interested and guessing what's going to happen next during the roughly 8-12 hours it is going to take you to complete it, depending on the level of difficulty and how interested you are in reading notes and listening to audio logs and ponies, which is optional.
I recommend starting to play this when you can play through it in one sitting, allowing yourself to get sucked into the world and its story about a pony that...
Wait, pony? There wasn't a pony... it wasn't supposed to be in this... ruined the whole review... I need to travel back to the beginning and erase it... set things right... I'm sure nothing can go wrong. Wish me luck, comrade.