Fluxx: The Board Game lives up to its card game namesake as this board game is all about change: changing rules, changing goals, and changing tiles on the board.
Players each start with three cards in hand, and the overall goal of the game is to collect 3-6 goal cards, with the exact number possibly changing during play.
On a turn, a player draws one card, plays one card, then moves one space, with all of those values being subject to change during gameplay. If you have a piece on each icon shown on the topmost goal card in play, you claim that card and are that much closer to winning. Other cards in the game allow players to change the rules, the game board, and even the ownership of player pieces!
Don't just take our word for it! Check out this review of Flux: The Board Game.