Valve has Team Fortress 2 for Windows or Mac on its Steam service for FREE for a limited time. There’s no catch! Play as much as you want, as long as you like! You will need to register for a Steam account in order to have access to the download. It’s FREE to signup for a Steam account.

Team Fortress 2 is one of the most popular online action games of all time. Valve delivers constant updates—new game modes, maps, equipment and, most importantly, hats. Nine distinct classes provide a broad range of tactical abilities and personalities, and lend themselves to a variety of player skills.