The game is a paid product developed by Marauder Interactive. You can find it on the following official storefronts:
is a premium tactical space combat simulator, and while it is not officially a "free-to-play" title, it is frequently available at a significant discount on major platforms. Official Availability and Pricing House of the Dying Sun Free Download
: Use this site to track current pricing and historical lows across different regions to find the best time to purchase. The game is a paid product developed by Marauder Interactive