In this kind of game you find yourself trapped in a room, often you don’t know how you got there and you never know how to get out of there again. Your task is then to look around in this room (meaning: point and click with your mouse) and to hopefully find things, which could be helpful for your escape. In a lot of these games you also have to solve some riddles or logic puzzles in order to get the next clue. Usually you can’t die in an escape game, but there are also some where you do, if you make a mistake. Most of them give you unlimited time, some don’t. I myself like the ones most where you can’t die, even if you try the most stupid things and take three days for it.
One really nice example (I think maybe the best I played so far) is the Escape Game [Vision], which I found recently. This game has very nice graphics, doesn’t require pixel hunting (searching for the tiniest things, which are almost unvisible for normal peoples eyes), but offers a lot of tricky logic puzzles and a reasonable storyline. It is not too easy, so I’d better give the link to the walkthrough as well.
choice of the better ones and google for something similar to ‘escape game’ or ‘room escape’, if you played through all of these and still don’t have enough.