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Steam is running a 2K Publisher Weekend Sale. Runs from 10/3 – 10/7. Every day there will be some new deals along with discounts up to 50% off the entire 2K catalog.
The 2K daily deal for 10/3/13 is 75% off XCOM: Enemy Unknown. There’s also a free weekend going on for the game. Play it for free until Sunday.
XCOM: Enemy Unknown $10
XCOM: Enemy Within $27
XCOM: Enemy Unknown – Slingshot Pack $1.74
XCOM: Enemy Unknown – Elite Soldier Pack $1.24