Very Elusive
ME2: Return to active duty
Missing in Action
ME2: Save your crew from an overwhelming attack
Completionist
ME1: Complete the majority of the game
First Aid Specialist
ME1: Use medi-gel 50 times
Archivist
ME1: Find all primary Alien: Council Races, Extinct Races and Non-Council Races codex entries
Medal of Honor
ME1: Complete the game on any difficulty
Insanity I
Complete Mass Effect 1, 2 or 3 on Insanity without changing difficulty
Neural Shock Specialist
ME1: Use Neural Shock 25 times
AI Hacking Specialist
ME1: Use AI Hacking 25 times
Singularity Mastery
ME1: Use biotic Singularity 25 times
Meritorious Service Medal
ME1: Complete Ilos
Paramour I
Establish a romantic relationship in Mass Effect 1, 2 or 3
Paramour II
Establish or rekindle a romantic relationship in two games in Mass Effect Legendary Edition
Damping Specialist
ME1: Use Damping Field 25 times
Barrier Mastery
ME1: Use biotic Barrier 25 times
Stasis Mastery
ME1: Use biotic Stasis 25 times.
Lift Mastery
ME1: Use biotic Lift 25 times
Council Legion of Merit
ME1: Complete Virmire
Charismatic
ME1: Use Charm or Intimidate to resolve an impossible situation in the game.
Warp Mastery
ME1: Use biotic Warp 25 times