Angry Video Game Nerd Adventures had Steam trading card support added on January 22, 2014. There are 6 cards in the series, and you'll receive 3 cards at random for purchasing and playing the game.
Angry Video Game Nerd II: ASSimilation also has Steam trading card support.
Where Did YOU Learn To Fly?
Super Mecha Death Christ 2000
Angry Video Game Nerd Background
Game Land Background