The Mailroom has been released on Steam and runs natively on Linux.
This indie game by Crowfriend is a simulation where you work as a human mail clerk in hell, sorting letters, brewing potions and uncovering the secret of the exit. The price is €8.15, with a launch discount of 15% off (€6.92) until November 5.
Survive the horrors of hell’s deadest-end job: a human mail clerk. Take the elevator down to the depths of hell, clock in, and get to work.
Time passes strangely in the dark realm, but you still punch a clock like any other job. Each day holds a different set of challenges to face and sinister developments to endure.
Use clues to properly identify and sort mail sent to your dark overlords. Fall into an all too familiar but satisfying routine. Don’t get too comfy though! Small slip-ups will not go unnoticed. The devil is in the details, after all.
Dissect (or pet) adorable amphibians, and process raw materials in order to provide the higher rungs of hell with vital umbral resources. Get the mixtures just right, and you may have a shot at employee of the month!
Keep the mail (and the blood) flowing with magical artifacts, and ancient tools. Despite residing in the dark domain, you should still keep a tidy workspace. Let the equipment fall into disarray at your own peril. If the mail stops, your heart might just be next.
Uncover the secrets of your surroundings and find your way to hell’s exit before you’re trapped for eternity.

Source: Steam