Valve has announced that a trio of Steam games will now feature in-game gifting, including Portal 2, Spiral Knights, and the newly free-to-play shooter Team Fortress 2.

The new feature lets users trade in-game items from any of the three games, as well as any game that has been gifted to them. While the just-out-of-beta feature currently only supports a few games, Valve says that it is courting other developers to start utilizing these features in the future as well.

For a full rundown on how the gifting works, check out the Steam FAQ.