Hi everyone, here's a fully functional excavator for the BGE. I put it all together with rigid body constraints. Works best if you have a __gamepad with two analog sticks __just like in the big ones! Unfortunately I wasn't able to use my 4 shoulder buttons to control the tracks so I had to use the regular buttons instead.
If you don't have a gamepad you can use the keyboard instead. Keys are SEDF (left stick), UHJK (right stick), QA for the left track and OL for the right one. Yes, that's hard work!
You can pick up the rocks but the ground itself is solid - this would be more than a tiny Python script can handle . Every now and then there's some issues with parts of the excavator colliding with each other, but nothing too serious. Models are not good - I'm more of a programmer : )
Hope you like it, Cheers