Have no idea what the point of the sim is. Spent $20 just to see if its PTW... nothing changed. It doesn't allow you to collect income in the 'build' section while you're slogging through the 'campaign'. About the 'campaign', you can only host one tank out of the 12 slots (even after level 34)...so you die because you have no other elements. Dont waste your time with this.