Adventure TCG is a fan-made trading card game based on the Adventure Time cartoon series.
(I have no official association with Cartoon Network, Frederator Studios, or any other rights holder. This game exists as a fan tribute to a cartoon I love, and no copyright or trademark infringement is intended.)
Everything about the game is free, and it is currently playable online using the free OCTGN game client.
It has been in private development off and on for about a year, and I felt it was time to open it up to all fans of Adventure Time. The game is still in development, so I welcome your feedback to improve the game!
Use the sidebar on the right to navigate to the game rules, downloads, and changelog.
A gallery of the cards can be seen here: http://photobucket.com/AdventureTCG