- Unlimited Winner
Won a skirmish match with more than 25m Lance Value on both sides
- The Deadliest Catch
Fielded a lance of four King Crabs, won, and lost no 'Mechs
- Kneecapper
Destroyed an enemy 'Mech's leg with a Called Shot
- Tis But a Scratch
Removed one arm from an enemy 'Mech
- Eck's Gon' Give It to Ya
Battled someone who has this achievement (and therefore has either battled HBS developer/BT tourney champ Chris Eck or battled someone who battled someone...who has)
- Rookie
Played 5 online multiplayer matches
- Seasoned MechWarrior
Played 50 online multiplayer matches
- Grizzled Vet
Played 100 online multiplayer matches
- Good Start
Won an online multiplayer match
- Champion in the Making
Won 25 online matches
- MechDominator
Won 50 online matches
- Legendary MechCommander
Won 100 online matches
- Try, Try Again
Lost 10 online matches
- Who's the Underdog?
Won a match with three 'Mechs vs. an OpFor with four 'Mechs
- Battle Winner
Won a skirmish match at the Battle (20m) Lance Value Budget
- War Winner
Won a skirmish match at the War (25m) Lance Value Budget
- Coward of the Periphery
Ejected 20 times
- 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
- 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
- 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
- You Can't Kill Me!
Have a 'Mech and its Pilot survive being knocked down, shutdown, and shot in the head
- 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
- One Vision
Become Allied with House Liao
- Honor The Dragon
Become Allied with House Kurita
- We Stand United
Become Allied with House Marik
- 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
- I Thought You Were Dead
- A Career Unheard of in Over Two Centuries
- Top of the Crew