The Steam winter sale has begun. The delicious deals include the scrumptious Portal and the exceedingly tasty Super Meat Boy for 75% off.

There are great deals on loads of stuff throughout the sale until January 2nd, but here are today’s daily discounts:

F1 2010 -50%

Battlefield Bad Company 2 – 66%

Fallout 3 (Game of the Year) – 33%

The Deus Ex Collection -85%

LEGO Batman -75%

Peggle & Peggle Nights -60%

Prince of Persia (Franchise) -75%

Portal -75%

F.E.A.R. (Franchise) -75%

Titan Quest Gold -75%

Super Meat Boy – 75%

Oddworld’s Oddboxx -50%

In addition to the usual savings specials, each day of the sale will feature a special Holiday Bonus on one select title. The twist: Players must qualify for the Holiday Bonus by owning another Steam game.

For example, the first Holiday Bonus is Portal – save an extra 10% if you own Half-Life 2. If you already own the title, Steam will automatically detect this and offer you the 10% savings during check out.

Expect many more games to go on sale in the daily deals, so don’t stock up on games just yet- the game you want might get even cheaper tomorrow.

Oh, and UK gamers can check SavyGamer if they want a list of games on sale without it crashing every five seconds.