Valve has launched the open beta of an "extensive update" to Counter Strike: Source via its digital game service, Steam.
As Valve explains: "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."
The beta's open to all via Steam but hurry, there are limited slots and when they're filled the 'Install Game' button will go bye bye.