Releasing so close to Pathfinder and Solasta isn't the best strategy for a game that seeks a very similar audience. Those folks have spent their rubles already this month.
I wouldn't discount the setting as a factor. Pathfinder and Solasta are high fantasy, and fans of post-apoc usually grab most everything that fits the genre since there are fewer games in it.
Trudograd is probably competing with Encased more than those other games.