PEW

Microsoft XNA Framework Redistributable 2.0

And, depending on when last you updated DirectX

DirectX End-User Runtime Web Installer

Select Number of Players: Keyboard 2, 3, 4

Select Die Color: Left Click Mouse

Rotate Turret: Move mouse

Shoot: Left Click Mouse

Quit: ESC

Players huddle around a single computer screen. The owner of the computer goes first, and from there the order is determined by age.
The game from two to four players, selectable by key press at the beginning of the game
Players start out with 10 health points.
The first player rolls the dice, one Black and one Gold. The black die represents your bullet color for that turn, and the gold die your defensive color which lasts until your next turn.
Bullets of a color (Red, Green, Blue) cannot hurt players who have a defensive color of the same. They also pass through walls of the same color.
Bullets of a different color than opponents do -2 damage. Bullets that do damage to their firers do -1 damage. When hitting a wall of a different color, they bounce off and change the wall to that bullet’s color.
Rolling a Yellow means you can select any color you wish for that specific die
Input the results of the dice roll into the computer with your mouse
Aim your turret with your mouse, and click to shoot
If the player has rolled doubles (two of the same color), he/she has a second shot available after shooting the first one
Once a player has finished shooting, switch to the next player
Last (wo)man standing wins