Steam's big holiday sales event is ongoing with a ton of games and game bundle collections with slashed prices. Today they have gone even further with one day sales on five titles. The prices are only valid until 12 noon Eastern time on Christmas Day.

The biggest deal is with the id Software Super Pack. You can now purchase and download over 20 games either developed by or based on id games for a mere $23.79. Also Serious Sam HD: The First Encounter can be yours for just $9.99 for one day. Left 4 Dead 2 is on sale for $33.49 while Need For Speed Shift has a price cut of $37.49. Finally Football Manager 2010 can be yours for just $29.99.