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