Various achievements and trophies in the the Xbox 360 and PlayStation 3 versions of the game reference characters from the Transformers franchise who don't appear in the game:

• Slugfest (Slugfest)
• Powerglide Performer (Powerglide)
• Motormaster! (Motormaster)
• Devastator! (Devastator)
• Brute-a-kiss! (Bruticus)
• That's No Mirage (Mirage)
• Blast-arachnia! (Blackarachnia)
• Spike's BFF (Spike)
• The Kup's Half Full (Kup)
• Scavenger Would Be Proud! (Scavenger)
• Grimlock Smash! (Grimlock)
• Ramhorn (Ramhorn)

Out of all these characters, Grimlock and Bruticus would go on to appear in the game's sequel, Transformers: Fall of Cybertron. However, Motormaster appears as a boss fight in the Nintendo DS Decepticon version of War for Cybertron.