Valve is the developer and publisher of several games that have Steam trading cards, including:
- Counter-Strike: Global Offensive
- Day of Defeat: Source
- Dota 2
- Garry's Mod (as publisher)
- Half-Life 2
- Left 4 Dead 2
- Portal 2
- Team Fortress 2
A documentary was also released by Valve with trading card support (although it is currently impossible to receive the cards):