Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
New Mutation: Lone Gunman
Get the full article at store.steampowered.com

Most Anticipated Title of 2010 Prepares for PC Launch

Oct 22, 2010- Valve and Activision Publishing, Inc today announced the upcoming holiday blockbuster, Call of Duty®: Black Ops (PC), is now available for pre-purchase via Steam, a leading platform for PC and Mac games with over 30 million accounts around the world.

Those who pre-purchase Call of Duty: Black Ops on Steam will be able to start playing immediately upon release on November 9, 2010, when Activision expects the title will be... [read more]

Pre-purchase now and get ready for Call of Duty®: Black Ops, the biggest first-person action series of all time and the follow-up to last year's blockbuster, Call of Duty®: Modern Warfare 2.

Call of Duty®: Black Ops will also utilize Steamworks features such as Auto-Updating, Achievements, Steam Cloud, and more!
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Team Fortress 2 (PC)Valve's democratic distribution pays off.
Get the full article at ign.com

Updates to Team Fortress 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Team Fortress 2
Trading changes
Added some anti-scam advice to the chat window.
Increased trading slots to 8 slots per person.
Added item rarity colors.
Added the item’s original name to the item description.
Made most tools tradable.
Fixed Ellis’ Cap and the Frying Pan not being tradable
Get the full article at store.steampowered.c... [read more]

Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
Fixed lobbies not being able to join Steam Group servers
Get the full article at store.steampowered.com

Mutant Chronicles (PC)The classic Mutant Chronicles strategy brand licensed for Paradox Connect.
Get the full article at ign.com

Updates to Left 4 Dead 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Left 4 Dead 2
Fixed the fix of the fix of the fix of the door exploit in No Mercy
Get the full article at store.steampowered.com

Updates to Team Fortress 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Team Fortress 2
Fixed another sentry gun exploit that let Engineers build multiple sentries
Fixed Engineers being able to build level 3 mini-sentries using The Wrangler for real this time
Get the full article at store.steampowered.com

Medal of Honor (PC)"Clean Sweep" multiplayer mode available next month.
Get the full article at ign.com