efroemling/ballistica
Ballistica is not aiming to be a general purpose game engine. Rather, its goal is to support creating one particular type of experience: 'physics based multiplayer action on small diorama-like environments built from real-world objects'. If you've got something you'd like to create that can fit within that box (as BombSquad itself does), give Ballistica a look. Of course, there is nothing preventing you from going and building an FPS out of this stuff, but I wouldn't recommend it.
Ballistica is built on a C++ core for performance-sensitive code with a Python layer for high level game/app logic. This Python layer is designed to be mucked with. Users can override core game functionality, write their own mini games, or anything else they can dream up, either by directly accessing files on disk or by working through an integrated web-based editor. It can be a fun way to learn Python without the danger of getting actual work done.
I love playing with physics simulations, and Ballistica was built partly to scratch this itch. Though the game physics in BombSquad have stayed largely unchanged for a while, my future plans for the engine lean heavily on making this more flexible and open-ended, opening up lots of fun multiplayer physics-y potential. Stay tuned...
