Since there are probably more different Titan toys, than fans here collecting them, I thought I would share a portion of one of the Australian TFs Toy Reference guides (in my signature)... dealing with the AOE Titans. (UPDATED - October 19th) So far seen/verified are four types of Titans... 12 inch - Optimus, Drift, Bumblebee, Lockdown, & Silver Knight Optimus (redeco - US Target/AUS Target Excl) 12 inch w/ weapon - Optimus (different mold to the other 12 inch), Grimlock (both exclusive to BigW in Australia - regular release in America?) 12 inch Electronic - Optimus (new mold), Bumblebee (same as other 12 inch), Grimlock (same as the one with weapon) (Kmart exclusive in America and Australia) 16 inch - Optimus, Grimlock (both are store exclusive in Australia to Kmart) That's 10 different Titan toys for TF4.... talk about over-kill. As the keen eyed will see, the 12inch Electronic Optimus looks the same as the 16inch Optimus, but has some minor sculpting differences... and, the 12inch weapon Grimlock also looks like the 16inch Grimlock, but there is some minor sculpting differences. (Titan sizes are from Hasbro US Press Releases or from Hasbro Australia) 12 inch (Bumblebee, Optimus, Drift, Lockdown) (plus Silver Knight Optimus - US Target/AUS Target Excl) . . . . 12 inch w/ weapon (Optimus - different mold to the other 12 inch, Grimlock) (Store exclusive in Australia to BigW, so could be store exclusive in America too) . 12 inch Electronic (Optimus - new mold, Bumblebee - same mold, Grimlock - same mold) (Kmart exclusive in America and Australia) . . 16 inch (Optimus, Grimlock) (Store exclusive in Australia to Kmart) . Collect them all! .