A good stealth game is the one called Dishonored. You get to sneak in through the one open window that is there, snuff out your single target and slide back out again without anyone knowing that you were present there in the first place. Alien Isolation is another interesting one and fun to play. This one is pretty addictive though. The central enemy in the game moves of its own free will, while you as a player need to move slowly and quietly to be able to hide when there's something horrible and scary in the room with you. And when you stealthily manage to make it to the next safe point, you literally heave a huge sigh of relief.