If you add a 1 to a -1, what do you get? That's right, the answer is 0 and in the game of Collider, that is the objective. There are two particle balls with opposite polarity '+ and -'. By making them collide with each other, you will eliminate them. This fun physics game will test your planning skills and will give you hours of fun and excitement. Keep sending the particle balls through the levels and try to beat all 25 of them. Once you've beat them all, pat yourself on the back, because it can get pretty tough.