Being that it is only 400 Microsoft points, you cannot go wrong with the simple, yet addicting, Geometry Wars.
The visuals are great when your are playing in the Evolved mode rather than the retro mode because obviously, the retro mode is based on a simple layout which tends to be very bland. The main mode you will want to play is the Evolved mode which looks amazing when there are many things exploding on screen that lights up any room. For only $5, or 400 Microsoft points, it would be hard to pass up this addicting shooter that anyone can play due to the very simple controls and concept. Give it a try by downloading the demo on Xbox Live and see how many times you come back to play it, you won't be disappointed.