Here's a list of the 11 Transformers unlocked as part of the above DLC pack;
• Jazz
• Jet Fire
• Sideswipe
• Soundwave
• Stealth Bumblebee
• G1 Megatron
• G1 Optimus Prime
• G1 Starscream
• G1 Sunstorm
• G1 Sideswipe
• G1 Ratchet
You may find it beneficial to copy that list into a word pad and mark them off as you win a match as them to help prevent you missing one!
Managing to fulfil the achievement requirements without boosting now is slim to none, not impossible, just very unlikely!
With that in mind get searching, you can set up a gaming session here; and try to find someone that way or you could ask around on the forums!
I've also linked in a video which show cases each of the new DLC characters so you can see what they look like and make sure you use them all, just be warned, they're not in the same order as above!
* Credit to Flikffxi for the video
