Metro 2033, Batman: Arkham Asylum, Mirrors Edge, Crysis , Aliens vs. Predator, Prey, Zeno Clash, CoD, Mass Effect, Psychonauts, Half Life 2, Mafia 2…and others. All of them have something to offer, wheter stunning atmosphere, unique art style or awesome graphics effects.
But my favourites are Metro 2033 - for the overall visual style of the game providing incredible atmosphere(from level design, guns, characters, to watches, bullet lighter and so on) and generally CryEngine - for the graphic technology. I am looking forward for Crysis 2 of course, but i am even more curious about their Sandbox level editor. I really hope they release the developer kit for free as well as UDK for non comercial purposes.
Eg did you know that everything in CryE3 is rendered in real time? It means you can see in editor exactly how it looks like ingame, only click and you’re playing, no more compiling. Do you need to texture the peaks of the mountains differently than other parts of the map (some snow texture)… you can easily apply the texture only for certain altitude of terrain or for certain pitch. Just imagine how much time it would take in Hammer.