Nekro

[booman]

Not sure how I missed this one...

http://store.steampowered.com/app/246400/

Nekro is a dark, twisted action game about summoning demonic forces to do your bidding. With a fully-customizable array of powerful monsters to summon, Nekro challenges you to create a specialized army of hell-spawn to counter the forces of a corrupt King.

Episode 5

Presskit page says "Linux" so I will look for a Linux version on Steam or GOG.com