Open Dynamics Engine

"Open dynamics engine" is like the game for toys to move and fall down. Imagine if you put a toy car on a slope, it will move and go down the slope because of gravity pulling it. Open dynamics engine is like that, but in computer games. It helps objects move and interact with each other as if they were real things, with gravity and forces that make them behave like they should in the real world. So, when you play a video game and the objects in it move and collide with each other realistically, that's because of the open dynamics engine. It makes the game feel more real and fun to play.