I didn't enjoy Lone Survivor the first time I played it. Combat is awkward, the story is obtuse and there isn't much to explore or to find.
Then I got to the end. It was obviously the bad ending. The game showed me why I got the bad ending, and I was put off. All that promotion of survival being up to you was bullshit. If you want the good end, you have to survive a certain way. So much for choice.
I was going to hang it up, but I was drawn into this strange story! I had to know what happened! I had to find out what was going on! So I played it two more times until I finally figured out how I had to survive to receive the good ending. It's still ambiguous, but it makes a hell of a lot more sense than Braid's, and provides much more closure, too. Satisfying closure.
Lone Survivor turned out to be the most satisfying game experience in months.
The atmosphere is creepy because of the retro graphics. The great music and sound design is a big factor. Makes the game feel like a cinematic experience. I'd recommend it to anyone.