This weekend, Steam is offering Call of Duty: Modern Warfare 3 at only $30 which is 50% off. The title is also free-to-play during the weekends.
Other deals include the Total War Master Collection which includes seven Total War games at 75% off ($32).
The newly released Tony Hawk Pro Skater HD is being offered at 10% off ($9).
Indie darling, The Binding of Isaac will also be on sale at 75% off.