Defeating the cement truck Decepticon
When you are fighting the cement truck Decepticon as Ironhide to knock him down transform and run him over Then pick him up and throw him
Various
To unlock the following insert the passwords on the main menu where campaigns can be selected et cetera
CodeEffectG1 Jazz SkinLeft Up Down Down Left Up RightG1 Megatron SkinDown Left Left Down Right Right UpG1 Optimus Prime SkinDown Right Left Up Down Down LeftG1 Starscream SkinRight Down Left Left Down Up UpNo Vehicles Military or PoliceRight Left Right Left Right Left RightRobovision Optimus Prime SkinDown Down Up Up Right Right RightUnlock All MissionsDown Up Left Right Right Right Up DownUnlock both Cybertron MissionsRight Up Up Down Right Left LeftUnlock Unlimited AmmoUp Down Left Right Up Up DownUnlock Unlimited Health InvincibilityLeft Left Up Left Right Down