Summary: Shrek forever after basically follows the storyline of the film (I'm told - unfortunately I haven't seen it still), with Shrek having signed a contract with Rumplestiltskin, which you must get back. The game is basically a little like Zelda - there are 6 different areas to explore (swamp, dragons keep, peasant village, catacombs, Docks, and Rumpelstiltskin's Palace) as well as an ogre camp where you can shop and also find goodies.
Summary: A great game for what it is. Up to 4 players can play on screen, ideal for 2. My 5 year old loves it, it is basically a good kids game for fans of Shrek. It is good value and there is enough to do, with a good story and impressive enough levels. The only downside I can think of is that the voice acting is not from the original actors and the game could be short (and it is just an improved version of the PS2 Shrek game).