Almost everything can be called art IMO - the term art can only vaguely be defined. But to me "Today I Die" is art. But I guess it could also be called poetry - when it comes to games the lines between art forms often more or less blurs.
It's a Flash game and only takes about 5 minutes to complete, so I'll recommend everybody to give it a spin.
http://www.ludomancy.com/games/today.php
Also, ICO for the PS2 (haven't completed it though):
http://www.icothegame.com/
EDIT: Adjusted the third sentence.