ALTER is a short first-person survival horror game set in the Paris catacombs.

You are the Exorcist sent to find two missing priests.

Explore the dark, follow what was left behind and uncover what took place down there.

You will not be alone.

Beneath the streets of Paris lies a forgotten labyrinth of bone and dirt. Take on the role of an Exorcist and navigate the endless passages, crumbling shrines and horrors that a hundred years of prayer couldn't keep buried.

When IT finds you, running will not be enough. Raise the cross and say the words aloud.

Speak your faith, or die with IT.

The dead have no use for what they left behind. Scavenge and manage anything and everything you can find. What you carry, what you use and what you leave will decide how long you last.

They left a trail.

Find their notes, follow their path and uncover what happened to the two missing priests.

Whatever they uncovered wasn't meant to be found.