Available immediately, Valve has launched an extensive update to Counter-Strike: Source, now in beta.

The update includes a host of new features and functionality developed in collaboration with Hidden Path Studios. These include 144 new achievements, a new domination and revenge system, player stats, and more.

This beta will run for a limited time, and once complete, the update will be deployed to all Counter-Strike: Source owners for free via Steam.

Here are the current list of changes as noted in the CSS Beta section at SPUF:
- 144 achievements added
- New lifetime player stats and summary screens
- New match player stats and summary screens
- New end of round display with MVP and interesting fact about a player
- Updated scoreboard with new icons, visual style, MVP stars, and avatar pictures
- New cinematic death camera
- New domination and revenge system
- Added avatar icons to voice chat, scoreboard, and end of round display
- Incorporated many source engine updates