Scythe is a modelling tool for physics engines. You can create objects, vehicles, ragdolls, structures... all from physical joints and bodies, and then test them, throw them around, break them, before saving to file and loading into your own game. With an Scythe, control of physics falls into the hands of the artists, freeing them to push the boundaries of what your game is capable of. Complicated structures can be visually assembled by an artist, as opposed to being blindly coded by a programmer who cant see what he's doing.