From the website:

The object of the game is to spell the word CHAOS! (in any order) on the table in front of you.

The deck consists of Letter Cards and Action Cards. There should be 32 Letter Cards(C, H, A, O, S, and "!" [exclamation point]) that say "CHAOS! RULES!" in lavender on the backs. The 40 Action Cards say "CHAOS! RULES!" in yellow on the backs. These cards feature specific actions that are to be followed immediately after the card is played.