P.T. - (***Spoiler Warning***) I took a break from my current games to play this...thing? It was announced at GamesCon 2014 and at first no one knew what it was. Turns out it was cooked up by Hideo Kojima and Guillermo Del Toro as a preview of a new Silent Hill game (to be called "Silent Hills"). It has lots of sly references that point back to Kojima like his birthday and the location of his studio in Japan. You can't really call this a game or even a demo, really. It's more of an interactive horror experience/advertisement/nightmare simulator. There are few commands other than being able to zoom in on things and a couple button press prompts. One visual effect I really liked was when you stood in a darkened hallway and waited, your "eyes" would get accustomed to the light level and then you could see more details. Really advanced stuff. It does have an ending which I was never able to get to (I had to watch a YouTube video to see it) along with some other tasks and interactions that are not required to get to that ending. It's extremely creepy, I'll say that for it. Watching a horror movie is nothing compared with being in a horror movie! I found myself trying to stay in lighted areas just because I thought I'd be safer there. When the ghost got me, I have to admit I was pretty freaked out! Toward the end of the game you can avoid her by not moving and I did everything in my power NOT to have to see her. There's no indication that this "playable trailer" will have anything to do with the game (no release date, by the way) but it's unlikely that the full game will be as scary as P.T. If Silent Hills is a long game or even a standard length one (10-ish hours), I doubt most people will be able to stand this level of tension for that long. A scare needs to be delivered quickly, not drawn out.
War of the Human Tanks Demo - I never got to the actual gameplay because it wouldn't shut the hell up! Too much reading!
Luftrausers - What do people see in this game?? It's like something from the Atari 800 era...but less fun! Cool music, but crappy controls.
Sid Meier's Ace Patrol - Now this is more my style! A turn-based WWI aerial combat game that plays like an old-style Milton-Bradley wargame. Very entertaining, but I don't think I want to get any deeper in it than picking up my four trading cards (which I did). I added it to a new "Pretty cool!" category in Steam.