Box2D vs. PhysX. In many ways, this is a ridiculous matchup. An open-source 2D physics engine vs. Nvidia’s proprietary 3D physics engine. Why even compare them? Because, if you’re shopping for an iOS game engine, these two are your likely choices. Box2D comes with cocos2d and Corona. PhysX comes with Unity and Unreal. And, even if you’re making a 2D game, Unity has enough advantages to make it a t
