These are two pre-release builds (an early alpha and a much later demo) for the Linux version of Planet Stronghold.
From the Steam store description of the game:
Planet Stronghold is a sci-fi role-playing game with a turn-based combat system.
take the role of a young, new recruit that somehow gets assigned to the
most well-known, and well-defended, human outpost in the whole galaxy:
As the story goes on, you'll have to choose a
side in a a war that will change the destiny of the planet, and of
Featuring old-school turn based tactical
battles, a dynamic plot that changes based on your choices, several
possible solutions to each situation using various non-combat skills,
Planet Stronghold delivers a very high replayability!