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Indie roguelike adventure for Windows, free for Amazon Prime subscribers until 1st October
Welcome to the Wall World, a mining rogue-lite with tower defense elements. Explore procedurally generated mines and discover fantastical biomes. Find resources and technologies for purchasing valuable upgrades. Fight off hordes of aggressive monsters using your mobile base. Roam the Wall freely day and night, in various weather conditions. Find traces of the others and boldly mine where no man has mined before.
I've played this for a few hours (from a previous giveaway), and it's fun. The gameplay is the common "die, upgrade, try again," but the timer on everything adds an element of frenetic choice-making as you decide if it's worth delving deeper into a seam or moving onto the next one.