Today, Valve announced Steam Trading Cards. Players will be able to complete a set through game play and “your collecting prowess”. Once a set is completed, they can be crafted into a game badge which will show up on your Steam profile and unlock marketable items such as emoticons, profile backgrounds, and coupons to use on Steam.
Badges will contribute to the exp of a users Steam Level. Leveling up will earn you non-tradable items like profile showcases which will allow you to customize what data is featured on your profile page, extra friends list slots in addition to others.
Currently you can get trading cards for the following games:
- Team Fortress 2
- Dota 2
- Portal 2
- Half-Life 2
- Don’t Starve