Underhell is a Source Engine game developed by the Underhell Team in collaboration with We Create Stuff. Underhell Chapter 1 requires ONLY Source SDK Base 2007 installed. No Source game is required.
Underhell is one of the most incredible experiences I have ever had with gaming. It eclipses most big budget games out there today. I would go so far as to say it rivals the colossus that is Half Life 2. Playing through chapter 1 was an epic journey. It was horrifying, exhilarating, confusing (in a good way), cerebral, and ineffably great. At first I thought the characters seemed a tad bland, but I quickly changed my mind. All of the characters are extremely interesting and are characterized with as little exposition as possible. So too with the story. There is very little exposition and you must pay attention and attempt to connect the dots as you go. That's one of the best parts. From the prologue, I was constantly trying to piece together the mystery surrounding the entire game and it is mysterious. The story is told in this mysterious and haunting manner that makes it not only unique, but undoubtedly one of the best stories ever told in a game. Underhell consistently surprised and stunned me with its excellence at every opportunity. Just when you think it can't get any better, it does. Just when you think there's no way it can still go on, it does. I thought the prologue was fairly and pleasantly long, but when I got onto chapter 1, WOW. It lasted a LONG time and it kept me engrossed and captivated every second of the way. I have never gone out of my way to review something with such high praise, but Underhell deserves it tenfold. I truly must say that my words are simply not enough to convey the mind stimulating and wondrous experience Underhell is. Please, go play it, you'll be glad you did.