- New Networking System. This release includes the TF2 networking system and is compatible with all Half-Life games and MODs. The new networking system improves play for all players regardless of their connection.
- VGUI Interface. The Valve GUI (VGUI) is a set of general purpose, extensible user interface APIs for displaying and manipulating user interface elements in-game. Available to mod authors in Half-Life SDK 2.0, the VGUI is exploited in this release via new in-game menus that allow players to change class, communicate with teammates and more by simply clicking through this customizable menu system-and subsequently eliminating the need to move your fingers off critical keys during the heat of battle. The new menu system is also designed to help new players get into the game, removing the need to know any extra keys beyond moving and firing.
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