A single level solo map with a built in physics model. The bobs are changed and you better make sure that you stock up before you do battle with them. The story line is pretty good and it makes sense with the bobs being so radical. Construction is good but the homogeneous texture choices really gets to be a little too much. Flow is ok, but you will need to find the chip insertion places. I found it no problem to find where the chips where, it was just where to place them. Worth you download for sure, take your time and watch out!!