This XNA game needs a WindowsXP based PC with one or two Xbox360 controllers attached to it.

If you've got the XNA Environment set up, just extract archive. You can then start the game by double-clicking on Chaos.bat. Press the start button on the Xbox360 controller to start a game. If you want two-player action just press on the start buttons of both controllers.

In the game by developer Leif Dehmelt. You use the the left Xbox360 controller thumbstick to move your circle and use the right thumbstick to repel enemy circles. You must slow down enemy circles to velocity 1.0 or lower to proceed to the next stage. Use the D-Pad to enter highscores.

Two-player games are usually cooperative, but can also be played with the goal to kill the opponent.

Very nostalgic, very amusing game.