Back years ago...probably 13 or so, we had a Macintosh. At some point along the line, we downloaded a game. It was so simplistic and extremely addictive, especially since it could potentially have 10 players. (I think...maybe 8 was the max, but I'm somewhat sure it was 10. Heck, you could have 5 players, each controlling two setups.)
Anyway, the setup was fairly simple. It was a 2D picture of a hill. I *think* you could alter the layout of the hill prior to each round by changing one or two variables. (That I'm not so sure about, but it seems familiar.)
On this hill, you could have up to 10 players (see above) that were situated at equal distances from each other and were unable to move from these spots. These players were represented by "cannons." What they resembled was a semicircle, and a small rectangle that was the "cannon." Two variables could be changed for the cannon arm itself. The angle, and distance. All players also had a "health" meter.
(The order from here on is a bit hazy, but it should be fairly accurate.) Prior to each shot, you were permitted to purchase whatever artillery you wanted. Some options were a tri-shot, a gas cloud, a large shot, and different size bombs, up to a nuclear blast. (Those are the ones that I still remember.) The game progressed as so: Each player, one by one, chose a certain ammunition, and then adjusted their angle and distance, aiming at any other player they wished. After all players had made their choices, the game played out that shot sequence. It showed each player's shot one by one. (I can't remember if the effects of the shot were immediate, or took effect after all shots were done.) The winner was the lone "cannon" standing after however many rounds it took to eliminate all other cannons.
One of the funnier aspects of the game was when your health was so low, you couldn't do anything except blow yourself up on purpose.
Seeing as how this was on the Macintosh, it's almost certain it was made for Windows first. Please, SOMEONE tell me they recognize my description. This was such a fun game to play with others.
*I wouldn't be surprised if there were different versions of this. Old, new, whatever you got, let me know them all!