Here is the full list of all 45 The Mercury Man achievements.
Finish the game without deaths.
Finish the game without using special ammo.
Arrest all bosses.
Use 20 medkids (during fights).
Arrest Pastelo.
Arrest Geldallion.
Arrest Gobbarbler.
Arrest Archangelton.
Arrest Riccar Fire.
Release all bosses.
Smoke 50 cigarettes (during fights).
Drink 50 bottles of beer (during fights).
Use all types of special ammo.
Collect all posters.
Betray Andrew.
Release Cluck-Cluck.
Release Pastelo.
Release Geldallion.
Release Gobbarbler.
Release Archangelton.
Release Riccar Fire.
Shoot Anne.
Leave Mars with the man you love.
Leave Mars with a friend.
Shoot Julia.
Leave Mars with the woman you love.
Execute all bosses.
Bad ending.
Refuse to shoot Anne.
Take a train trip without napping.
Clear the table during the train trip.
Leave the bunker with Anne.
Kill all security guards.
Deal with Victoridge.
Kill Goldenmouth.
Execute Cluck-Cluck.
Execute Pastelo.
Execute Geldallion.
Execute Gobbarbler.
Execute Archangelton.
Finish gunsmith’s challenge.
Spend 2 or more hours in the game.
Execute Riccar Fire.
Finish a fight without using beer, cigarettes and medkits from the inventory.
Finish Prologue.