Discussion: Which Games will you guys say you have enjoyed playing the most...

Guys, lets discuss and share our views. Which games have we played(past or present) that we have enjoyed the most. I have played quite a number of games. I love adventure games the more cos they are tactical, and I love anything stealth.
To me, I think a game I enjoyed so much is Splinter Cell: Blacklist. This was full of stealth and missions that put you in a real terrorism setting. It had an awesome story line. Let me hear your views.