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