T easily complete levels under the Hard difficulty setting for related achievements or trophies. Complete a level under the Easy difficulty, then 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.
ACHIEVEMENT - HOW TO UNLOCK A 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's hand as he falls into the energon goo in One Shall Stand. Autobot Recruit (15 points - Autobot Campaign Complete (Easy). Autobot Commander (30 points - Autobot Campaign Complete (Medium). Autobot Prime (45 points - Autobot Campaign Complete (Hard). Dark Awakening (10 points - Complete Dark Energon on any difficulty. Starscream's Brigade (10 points - Complete Fuel of War on any difficulty. The Fall of Iacon (10 points - Complete Iacon Destroyed on any difficulty. The Secret of Omega Supreme (10 points - Complete Death of Hope on any difficulty. Victory is Mine (10 points - Complete The Final Guardian on any difficulty. Your Lucky Day (15 points - Kill all but 1 of the neutral prisoners in Dark Energon. Thief in the Night (15 points - Find and disable all security trip-wire switches in Fuel of War. Chaos Bringer (15 points - Destroy the planets in the Stellar Galleries in Iacon Destroyed. Motormaster! (15 points - Race across the Chasm Bridge in 33 seconds in Death of Hope. Devastator! (15 points - Destroy all cover in the arena in The Final Guardian. Decepticon Grunt (15 points - Decepticon Campaign Complete (Easy). Decepticon Seeker (30 points - Decepticon Campaign Complete (Medium). Decepticon Warlord (45 points - Decepticon Campaign Complete (Hard). Till All Are One (30 points - Complete both Campaigns (Any Difficulty). Brute-a-kiss! (15 points - Ignite a Brute's back 5 times in Campaign or Escalation. Footloose and Fancy Free (15 points - Destroy a Jet Soldier's foot thruster 5 times in Campaign or Escalation. That's No Mirage (15 points - Headshot a Cloaker when it is invisible in Campaign or Escalation. Targetmaster! (15 points - Kill 2 Snipers in 5 seconds in Campaign. There Are Parts Everywhere (15 points - Multi-Kill 3 car soldiers at once using an explosive weapon in Campaign or Escalation. Blast-arachnia! (15 points - Destroy 100 Spiders in Campaign or Escalation. Fire in the Sky (15 points - Melee-kill a Jet Vehicle in the air in Campaign or Escalation. Friends to the End (15 points - Finish any level in Co-Op. Unlikely Allies (15 points - Finish any level in Competitive Co-Op. More Than Meets the Eye (15 points - Earn a 1st Place MVP award in any Multiplayer mode. You Got Spark, Kid (5 points - Reach level 5 in any single class in Multiplayer. Spike's BFF (15 points - Reach level 25 in any single class in Multiplayer. The Kup's Half Full (25 points - Reach a combined class level of 50 in Multiplayer. Only the Strong Survive (50 points - Reach a combined class level of 75 in Multiplayer. Top of the Scrap Heap (75 points - Reach a combined class level of 100 in Multiplayer. Prime Directive (30 points - Unlock Prime Mode. Powermaster! (30 points - Spend 25,000 Power in Escalation mode. Heavy Metal War (50 points - Complete the 15th wave in Escalation. Scavenger Would Be Proud! (25 points - Destroy all hidden Autobot symbols in the Decepticon Campaign. Grimlock, Smash! (25 points - Destroy all hidden Decepticon symbols in the Autobot Campaign. Action Master (15 points - Get 10 kills with a single detached turret in any mode. Wait! I Still Function! (30 points - Get 3 kills while downed in a Co-Op Campaign or Escalation mode. Ramhorn (15 points - Ram-kill against an enemy who is stunned by an EMP grenade in Campaign or Multiplayer.