- Plague of Locusts
Won a 4v4 match with all of your 'Mechs being Locusts
- Learn from Your Mistakes
Lost to the AI one time
- Training Is the Path to Victory
Won 10 skirmish matches
- Getting the Hang of It
Won 50 skirmish matches
- Champion of the Arena
Won 100 skirmish matches
- Coward of the Periphery
Ejected 20 times
- Look Out Below
Destroyed 5 enemy 'Mechs with Death from Above
- On Wings of Flame
Destroyed 20 enemy 'Mechs with Death from Above
- Rock 'Em
Destroyed 50 enemy 'Mechs in melee
- Bug Stomper
Destroyed 50 enemy vehicles with melee
- Blaze of Glory
Destroyed an enemy 'Mech and your own 'Mech while using Death from Above
- Highlander Burial
Destroyed an enemy light 'Mech with a Highlander Death from Above
- Humpty Jumpty
Destroyed an enemy 'Mech with Death from Above using an UrbanMech
- Trash Can Fire!
Destroyed an UrbanMech with Flamers
- Beta Strike
Destroyed an enemy Orion with an AC/20 headshot
- Pick On Someone Your Own Size
Your light 'Mech killed an assault 'Mech with a melee attack
Locked - 2 guides
- The Trashmen Cometh
Fielded a lance of four UrbanMechs, won, and lost no 'Mechs
- The Deadliest Catch
Fielded a lance of four King Crabs, won, and lost no 'Mechs
- Who's Next?
Hired 25 MechWarriors
- Keep 'Em Coming
Hired 50 MechWarriors
- MechWarrior Factory
Hired 100 MechWarriors
- In Over Your Head
Retreated once from a contract before any of your 'Mechs got destroyed
- Run Away Faster!
Retreated 10 times from a contract before any of your 'Mechs got destroyed
- Age-Old Question
Won a skirmish match with three Commandos vs an AI Atlas
- Atlas Shrugged
Won a skirmish match with an Atlas vs four AI Commandos
- One 'Mech Army
Successfully completed a contract using only one 'Mech
Locked - 2 guides
- Flame On!
Destroyed an enemy 'Mech with Flamers
- You Can't Kill Me!
Have a 'Mech and its Pilot survive being knocked down, shutdown, and shot in the head
- Punchmaster 6000
Refitted a 'Mech with only Support weapons
- Special Thanks To You, Too!
Watched all of the credits
- Complete Roster
Acquired all 36 launch date 'Mechs
- I Am Iron Man!
Completed a Campaign with Iron Man enabled
- Professional Scavenger
Start a campaign with 'Mechs requiring 8 parts, then complete 10 'Mechs
- Indomitable Will
Become Allied with House Steiner
- By Freedom's Sword
Become Allied with House Davion
- Honor The Dragon
Become Allied with House Kurita
- We Stand United
Become Allied with House Marik
- Hail to the Queens
Become Allied with the Magistracy of Canopus
- Loyal to the Periphery
Become Allied with the Taurian Concordat
- Survived A Mercenary Career
Completed your first Career Mode campaign with any rank
- A Veteran Mercenary
Accomplished a Career Mode score at Veteran rank (>320,000 points)
- An Elite Mercenary
Accomplished a Career Mode score at Elite rank (>480,000 points)
- A Legendary Mercenary
Accomplished a Career Mode score at Legendary rank (>720,000 points)
- Heart of Iron
Completed Career Mode with Iron Man enabled
- Yar Har Fiddle Dee Dee
- A Career Unheard of in Over Two Centuries