Megatron was holding millions of humans hostage in a bid to get the Earth to surrender unconditionally to the Decepticons.
After the victorious , Optimus and the other autobots, as well as Cade and Vivian were able to make it out of the crumbling planet.
The two Autobots were then swarmed by Decepticon police officers, who Optimus fought until his dying breath.
Optimus and Bulkhead battled Megatron and Starscream for one of the pieces, but Megatron escaped with the prize, leaving Prime buried alive.
Fast Action Battlers - Optimus Prime Power Hook - This was an over-simplified and somewhat deformed version of Leader Class Movie Optimus Prime that featured some quick transformation sequences and a powerful projectile launcher projectile attached to figure by a string.
The de-combined Autobots promised that if the Predacons ever returned, they would be there to again defend the Earth.