A free demo with Linux support is now available on Steam for Virtualord, The Virtual Conqueror.
Virtualord is a turn-based strategy game with tower defense and RPG elements where you build bases, set up production chains and conquer whole planets. The full game is announced for Q1 2027.
The demo contains the first planet of the full game with 3 tutorial missions and 2 extra missions that can be played freely after the tutorial. According to the developer, that should offer at least 2-3 hours of gameplay.
In this demo you will find the same first planet you can find in the full game, which includes 3 tutorial missions and 2 extra missions you can play freely after you complete the tutorial.
These 5 missions should offer you at least 2-3 hours of gameplay.

Source: Steam