The Review Board: Star Fluxx
Star Fluxx is an entertaining game in which each player starts with 3 cards, and from there the game just keeps changing. Star Fluxx is easy to learn, since each card clearly explains the changes to the game. Any game of Fluxx begins with just a couple of very simple rules (take a card play a card), but new rules are added to the basic rule, and they take effect immediately. Thus, every game of Fluxx is always different from the previous one.
To win, a player must meet a goal's conditions (s/he wins even if it is someone else's turn). To play a goal, a player places it up in the center of the table discarding any previous goals. Thus, you can be on your way to a win one minute, and light years away from winning a minute later.
Most goals require keepers to win, and players must play them in order to win, but by doing so you will put keepers at risk, others can take them and creepers (cards that usually prevent you from winning) can be attached to them.
In addition, to the above cards, players can play surprise and action cards, that change the game and might have different outcome if played during your turn, or during someone else's turn.
Over all Fluxx is a great game for 2-6+ players, it takes about 30 minutes, and in my opinion plays better with a large group.