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 start the game with their three pieces in the center of a 3x3 grid of tiles, with each tile divided into four spaces and each space showing an icon of some type (chocolate, sun, cookies, etc.) or an octagon or a portal. 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; depending on what's currently allowed by the rules, you can also use movement points to rotate or move tiles in the play area. 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. Players can also claim goal cards they have in hand by, again, placing their pieces on the appropriate icons. Other cards in the game allow players to change the rules, the game board, the ownership of player pieces, and so on.