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