Companions in Mass Effect 2 are special NPCs that can be recruited to join the player's party. Companions fight alongside Commander Shepard, and have their unique set of stats, abilities, equipment, lore and even their own specific missions, some of them are required by potencial Companions to join the team, and all Companions have a Loyalty Mission each. Companions can agree or disagree with Commander Shepard, they can also die permanently.
All Mass Effect 2 Companions Guide
The following Companions join the squad at the beginning of Mass Effect 2 as part of the story.
Available after Freedom's Progress
Available after Horizon's Mission
Unlocked by taking specific decisions
The following Companions require specific decisions during missions from Shepard to be unlocked and join the squad.
The following Companions are included as part of different DLC.