Unlockable characters:Unlock the following characters by performing the corresponding tasks:CHARACTER – HOW TO UNLOCKPlay as Arcee – Successfully Complete the Autobot campaign.Play as Slipstream – Successfully complete the Decepticon campaign.Easier Hard difficulty levels:Use the following trick to complete levels easily under the Hard difficulty setting for related achievements or trophies. Complete a level under the Easy difficulty. Return to the final checkpoint at the level selection screen. Change it to the hard difficulty setting, then complete the remaining portion of the level again.Achievements:ACHIEVEMENT – HOW TO UNLOCKA Prime Problem (10 points) – Complete Defend Iacon on any difficulty. The Last Prime (10 points) – Complete Kaon Prison Break on any difficulty. You Got the Touch (10 points) – Complete To the Core on any difficulty. The War Within (10 points) – Complete Aerial Assault on any difficulty. The Harder They Fall (10 points) – Complete One Shall Stand on any difficulty. Paging Ratchet (15 points) – Revive 5 Autobot soldiers in Defend Iacon. Beak Breaker (15 points) – Shoot the 3 Hidden Laserbeaks throughout Kaon Prison Break. Slugfest (15 points) – Save the Slug before it is executed in To the Core. Powerglide Performer (15 points) – Fly through the coolant tunnels in 23 seconds in Aerial Assault. First We Crack the Shell… (15 points) – Get smashed by Trypticon