FunRun

FunRun - FunRun is the first true multi-player action game for mobiles. With true multi-player we mean that you can play against people from all over the world in the same arena at the same time.

First of all you need an MIDP2.0 compliant telephone. So you have to buy one if you do not have it already.
Second, you need internet access via I-mode, Vodafone Live or something like that.
The extra costs you have depend on your provider. Funrun requires internet access because it is multi-player. The typical dataload will be 1KByte per second. For a typical mobile internet account (via Vodafone Live) this means 15Eurocent per minute.

Goal: Go for the highscore by walking through the arena and collecting diamonds and shooting opponents.