Cullen again reprised his role as Optimus Prime in the video games '' Transformers : War for Cybertron '' , '' Transformers : Fall of Cybertron '' and '' Transformers : Devastation '' , and in the recent television series '' Transformers : Rescue Bots '' , '' Transformers Prime '' and '' Transformers : Robots in Disguise '' . His performance in the premiere season of '' Transformers : Prime '' earned him a nomination for a 2011 Daytime Emmy Award in the Outstanding Performer in an Animated Program category
2011 Daytime Emmy Award
38th Daytime Emmy Awards
Peter Cullen