Larva Mortus for Mac

From Rake in Grass:

At the end of the 19th century, dark forces shade the world once again. A brave agent experienced in exorcism and combat comes to face the incoming evil and fight loathsome supernatural monsters and horrific spawns of black magic.

Larva Mortus offers fast and entertaining monster-hunting gameplay. Cheesy horror atmosphere goes hand in hand with a furious action splatterfest, complete with creepy soundtrack

This is the demo for Larva Mortus. You get to play most of the game, but you cannot level up unless you buy the full version.