Change/Modify Game Mechanics

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Alright heres what I'm thinking, Make a Physic/Collision based Property/script so I can Break down a door with Any thing that has a Body/Weight (IE, a Chair. Sledgehammer) anything really.

That's something i've planned for one of my projects, and it works in the same way as plate and glass entities. In the entity's user defined variables, you can specify the force required to cause damage to the entity being hit.