Added 3 Heavy unlockables
- Natascha, The Sandvich, The Killing Gloves of Boxing
- Added 35 new Heavy achievements

Added Arena game mode
- 5 arenas: Lumberyard, Ravine, Well, Granary, Badlands

Added 2 new maps
- Badwater Basin, a new payload map
- cp_steel, a community map by Jamie "Fishbus" Manson

Changes
- Added server map timeleft to upper right of scoreboard
- Added new firing sounds to The Backburner
- Removed the Custom Tab in the serverbrowser, and added the Tags field to the base Internet Tab
- Increased The Kritzkrieg's uber-charge rate bonus from 10% to 25%
- 32 player servers can now support an extra slot of SourceTV
- Made the freezecam item panel description easier to read
- Players now broadcast whether they chose a team directly or use autoteam
- Added proper handling of cart blocking recognition to Payload maps