Dynamic particles for damage.
DDP adds a special debris system for real-time collisions. Particles bounce off the ground and walls, slide and stop, rather than disappearing.

 Breaks in joints and impacts generate their own debris: nuts, bolts, and metal fragments from broken welds. Shards of glass and plastic, chunks of concrete, and dust from collisions all correspond to the force of the impact.

Includes a user interface application for changing game parameters with live sliders and presets for adjusting radiation, elasticity, friction, and more.

 In version 1.9:
- Each unique part has its own type of debris.
- When moving through debris, it is thrown back, and there is now a chance to weaken the grip of the wheels.