This game does a great job on making you feel alone.
The story of this game is, that you are a fisherman who has ended up on a strange island that has a lot to it. You are on a quest trying to survive. You meet up with a bunch of people who tell you what to do. You may come across some zombies every now and then.
The gameplay runs smooth, sometimes, unless if there is a lot of pixels and models and textures to process, other then that, it still runs very good. The puzles are fun to do, but sometimes very stressful if it is the first time playing this game, other then that, fun.
The graphics are great! Especially for a source engine game, but source engine games look beautiful anyways. The graphics really fit the atmosphere of the game. Alone, scared, dark, etc.
Great game. It's worth playing, and maybe even beating, but that depends who you are.