In order of purchase, from all of the games that I was definitely not going to buy these Steam sales because I already had all of the games I was interested in:
Ys Origin
Ys The Oath in Felghana
Universe Sandbox
DA:O
Dead Island
Faster Than Light
LA Noire
Hawx 2
Just Cause 2
Bioshock 2
AoE 3
Chivalry
Tomb Raider I
Tomb Raider II
Tomb Raider III
Tomb Raider: The Last Revelation
Tomb Raider: Chronicles
Tomb Raider: The Angel of Darkness
Tomb Raider: Underworld
Tomb Raider: Legend
Tomb Raider: Anniversary
RUSE
Galactic Civilizations II
Ace of Spades (4 Pack)
And considering FM 2013 as well
So yea, I stuck to my "no buying" rule this year as well