Bioshock, superb aesthetic, awesome nods to many schools of thought, from Rand to Nietzsche.
Great premise, great presentation... But the gameplay kinda bored me.
Prototype, amazing sense of freedom.
L.A Noire, made me feel like a real detective at least twice and looked amazing.
Dead Space 1&2, great design, great art direction.
Far Cry 2, really fun fire physics, very good immersion.
Just Cause 2, great feeling of freedom, stunning environments from the air.