FTP and installation info
I've submitted Shoot.XoX.compressed and Shoot.XoX.source.compressed to this FTP site.  Shoot.XoX.compressed is a tri-fat XoX bundle binary.  Just install this in your ~/Library/XoxGames or /LocalLibrary/XoxGames, run XðX (available at this or other popular NeXT archive sites), and you're in business.  Shoot.XðX.source.compressed is (obviously) the source to this project.  You should be able to use this to (a) build the module yourself if you don't trust my binary, or (b) learn how to write simple XðX modules, or (c) all of the above.  For more info on what the game actually is, here's the info from the help panel:

Shoot
"the futility of modern warfare"
By Erik Kay
Erik_Kay@next.com

Hey... this is pretty mindless fun.  You need a pal (someone to toast) or it's really boring.  Here's the idea:  you and your pal (er... enemy) are at war with each other.  Each of you has chosen a strategic tower that's next to the amazing floating XðX brick of gold.  If you can beat back your enemy, the gold is yours, and your army will go on to pillage and destroy the enemy!  You each have 9 reinforcements waiting in the wings to help destroy the enemy before he gets you!  Get it?

Well, if not, how about this:  you're controlling a gun on one side of the playing field, trying to shoot your opponent's gun on the other side of the field.  Clouds above indicate the speed of the wind that will affect the trajectory of your cannon balls.  Between you and the enemy (at a random height) is a big floating XðX brick.  It's completely impervious to your shots, and serves only to get in your way.  Another random factor is the height of the tower that your gun is sitting on top of.  Each time you destroy your opponent, you get a point, and the playing field is randomized (wind speed, gun height, XðX brick height) once again.

There are two numbers below each gun.  The left number is the amount of gun powder you're going to use in the current shot (it increases as you hold down the shoot key).  The right number is your score: the number of enemy guns you've destroyed this game.  When you destroy all of your opponent's guns (10), the game ends.

You will have three control keys: rotate the gun left, rotate the gun right, and shoot.  Rotating the gun simply changes the initial angle of your shot.  The fire key not only fires the cannon ball, but controls how much gun powder you load your cannon with for the shot.  The longer you hold down the fire key, the more gun powder you use in your shot.   When you release the fire key, the cannon ball is fired.  Watch out though, your cannon ball can destroy your own gun if you're not careful!

Here are the actual keys:

player 1:
	rotate left: 		,
	rotate right:		.
	fire:				space

Player 2: (from the numeric keypad)
	rotate left:		2 
	rotate right:		3
	fire:				0

Credits and Disclaimers
Thanks to Sam Streeper for the XðX engine and help writing this (you need Sam looking over your shoulder to explain his bizarre API if you want to have a prayer of making your XðX module work :-P)

Don't even think for a second that this could be a product of NeXT Computer, Inc.  I did this in my spare time at home.  Really. (well, except for the color TIFFs I guess... but the rest... well, maybe not all of the rest... but... oh, never mind!)