I don't care if this is another "random" topic. I reached Prime Mode yesterday and just want to see if anyone has any questions about it. If not then fine. All I know so far is that you have new set of challenges and these ones are harder than the other set. These include ones such as to kill 15 people without dying and to do things like activate your 3 killstreak ability 2 times and so on. Though I face a problem of Arcee's chassis being locked again. It says to complete the Autobot Campaign again.