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