Counter-Strike: Source Beta
Counter-Strike: Source Beta was an open beta version of the game Counter-Strike: Source released on 8th of May, 2010. It used to upgrade the game to the Orange Box engine, and included many additional features similar to Team Fortress 2. The beta was developed in conjunction with Hidden Path Entertainment, who later known for co-developing a Counter-Strike: Source port for consoles that was later turned into a new Counter-Strike game, called 
CS:GO alongside Valve. It was finished and released in Jun 23, 2010.
Changelog
The version of the game (when it was released) came with this changelog:
- 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
