Just beat Shadow of the Colossus (finally).
If you have a PS3 (I think it's even available for download for PS4 maybe?) or even PS2 if you can bear the low res and terrible framerate (PS3 is an HD remaster) GET IT. It's easily in my top 5 games of all time.
It's part of the Team Ico collection, comes with their other game Ico which is very well received too but which I haven't played other than for 5 mins.
Come to think of it what would be everyone's top 10 games of all time?