"The basic idea of Bejeweled is that there is a board of gems. You need to switch them in such a way that you get three or more in a row. These gems then disappear, you get points, and the gems fall down to replace them, with new gems coming in on top.
You can take it online as well - it is the exact same game but against another hero characters, so see if your game-breaking combinations can stand up to other players' attempts.
Throw in a nice selection of Achievements for you Gamerscore junkies, and you have a nice little package, very attractive for the price. Alternatively, you can take a look at the portable versions on both PSP and DS, or the console versions on the Wii and the PS2. Definitely worth a look for all."