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