Download of Deadnaut 1.3.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this software for Mac is Screwfly Studios Pty Ltd. The program lies within Games, more precisely Strategy. We recommend checking the downloaded files with any free antivirus.
From the developer:
Deadnaut is a a challenging, character-driven game of complex strategy, cunning tactics, dynamic missions and customization. You need to explore, investigate, and fight your way through the derelict ships of dead civilizations. Every mission is unique and no two locations are the same. Each ship contains mysterious enemies and hostile security systems.
You may want to check out more software for Mac, such as Thief 2X, Ranch Rush 2 Collector's Edition or Jean's Boutique 2, which might be similar to Deadnaut.