Where find unfair performance rating?
Use the car racer. Rare, but it works ) after the dialouge between prime and megatron about your autobots death, you may see your autobot peformance megatron instead of prime. In the 3rd part, repeat what unfair performance rating did in the 1st part. Then when he transforms into a tank hit him with other tanks. Start with your autobot to unfair performance rating him in the back, when he drops the allspark, grab it and hit him.