One of the simplest arcade games on Xbox Live's Marketplace, for 400 Microsoft points, Feeding Frenzy consists of swimming around a steady screen full of rich sea life, gobbling up anything smaller than you or edible (to an extent). You start off as a little fish known as Andy, a small triangular fish that can dash around the screen in quick bursts via the A button or a trigger. Soon enough you unlock new fish which have the additional power of inhaling fish from a distance via the X button. The objective really is to eat as many fish as possible to become larger enough to progress to the next level and start all over again. Each level typically has 3 groups of fish all making themselves known, and you mush maneuver your fish into the direction of the smallest to eat them - the more you eat, the larger your fish becomes and when a set amount of points are gained, you get larger enough to take on bigger game. Of course it does have other elements to put you off and aid you in your attempt to become.. well.. a massive fish. There are depth charges that float about, hordes of jellyfish that paralyse, poisonous fish that reverse the controls and big enemies like Killers Whales and Sharks.
The power ups consist of:

Stars (for more points)
Frenzies (make you grab every edible fish on screen)
Atoms (freezes every fish on screen)
Lightning bolts (speed up)
'S' (Shields)
Pearls (points)
Black Pearls ( more points)
Special Fish - like the golden snitch (more points)
Mermaid Stars (points for surviving a level)

Every now and then there are minigames in which you must dash across the seabed to steel pearls or floating stars. Which brings me onto the source of pearls, the clams - which are taken on at your peril as they clamp down tight when enough time has elapsed so there is an element of risk involved. You die when eaten or destroyed but then there are lives and continues to keep you going. The backgrounds are quite well done, with several colourful oceanic vistas in multiple shades of blue. Music is largely background noise or cartoonish drivel. The achievements are a bit on the ambitious side with such tasks as 'eat 1000 sharks' and play 10 hours. The simplicity is a double edged sword for this game though because on one hand it is a great advert for 'Pick up and play' but that in turn makes it lack in gaming variety. The only things that really change are the appearances of fish and levels and the difficulty of such levels, with more and more on screen activity. Overall a nice little game for everyone to unwind with or pass the time, in a relatively stress free way.