Question: how to unlock all characters in risk of rain 2?
Answer: Commando. How to unlock Commando: Start a game. ... 
MUL-T. How to unlock MUL-T: Beat the first level 5 times. ... 
Huntress. How to unlock Huntress: Beat the first 3 levels without dying. ... 
Mercenary. How to unlock Mercenary: Obliterate yourself at the Celestial Portal at the end of the seventh stage. ... 
Engineer. ... 
Artificer. ... 
Acrid.