EA Sports has confirmed that Madden NFL 13 Ultimate Team will be expanded with the inclusion of key packs.
Players won't be able to purchase key packs via micro-transactions, but they'll instead by awarded when a player completes a team collection or a solo challenge A random key card out of 38 rare collectible player cards will be awarded when the player completes one of the aforementioned challenges. The key pack cards can then be traded within the auction house.
EA has also revealed a spreadsheet containing every rating of of Madden NFL 13's players.
Madden NFL 13 launches tomorrow in the US and Friday in Europe.