i'm not sure what kool aid you guys are drinking but it's obviously pretty good. The initial force imparted on an object is constant unless another force is enacted upon it. Force doesn't impart a velocity. it imparts an acceleration. If absolutely nothing is there to counter my force i impart on an object, even if i only impart it at the very beginning, I impart an acceleration that is fixed, because the force applied is fixed. The only way for that acceleration to become 0 is if another force counters the one i imparted. I'm sorry but you're fairly mistaken. Velocity is only constant if a force is not imparted to change it. But once a force is imparted, it doesn't go away unless another force is imparted to counter it. Since we're not concerned with gravity or other electro-magnetic forces ...we will assume there are none, since we're talking about a game that doesn't simulate them anyway. You guys are all wrong. Sadly. But completely. edit: basically, F=ma. This is an equation per moment. You're confusing it with a constant force over time. That mis-understanding would be an integral of the equation.
Are you honestly still backing this?
Unless there is something accelerating/decelerating the object, there is no change in velocity. The object is an inert lump of metal. It has no accelerating capability of its own. Only the gun imparts this.
When you drive your car you put your foot on the pedal to make it go. When you take your foot off it slows down. If you keep it at a certain point it stays at a constant speed. The reason is friction. In your mind, the fact that you impart enough power to overcome the forces of friction should therefore mean that as you are accelerating, removing the engine from the equation doesn't matter because your acceleration is so high that it has overcome friction and would continue to overcome it.
In space there is 'virtually' no friction. Your explanation will allow ANY object to eventually reach the speed of light because it will continue to accelerate even if the origin force imparted was you passing wind.
If you want to see this in action try this :
http://www.dailymail.co.uk/sciencet...atellite-orbit-spacewalk.html#v-1796170469001
Watch as they launch the satellite. Once it has left their hands it does not go any faster. It moves at a constant velocity because there is NOTHING acting on it to give acceleration. Explain why it is not getting faster and faster if acceleration is a constant.