Team Fortress 2 - Development Documents

Documentations for Team Fortress 2, and links to tools which allows users to create custom addon content (maps, items, and others).

Frequently Asked Questions · SDK Installation

Level Design	Information about creating maps. (Hammer)
Scripting	Writing scripts for Team Fortress 2.
Itemtest	Publish your items with Itemtest.
FGD	Team Fortress 2 .fgd.