Just saw this has apparently started, with the usual mix of discounts and demos.
Looking into the demos, something I can highly recommend is Spirited Thief, which is a pretty unique turn-based stealth-puzzler. Not overly unique, except for that turn-based aspect that really changes how the game feels.
I wish they'd do a remaster of the Splinter Cell series. I loved them but the gameplay is too clunky for me to enjoy going back. A few tweaks, especially to resolution, and a fresh coat of paint would be awesome.
One of my dream games is a Chaos Theory remake in the same vein as the RE remakes. That, and don't mess with the Amon Tobin soundtrack - it's perfect as is.