Unlock the following bots by performing the corresponding tasks:

BOT - HOW TO UNLOCK
Generation 1 Jazz - Complete all sub-missions in both story lines.
Generation 1 Megatron - Collect all the Transformer Shields in the Decepticon story line.
Generation 1 Optimus Prime (cartoon model) - Collect all the Autobot Faction Symbols in the Autobot story line.
Generation 1 Robo-vision Optimus Prime - Successfully complete the Autobot story line.
Generation 1 Starscream - Successfully complete the Decepticon story line.