Once you have captured a gold mine from the corrupted, you must repair it and build defences to stop anyone from stealing your gold. As you can see from the screen shot, you place defences in your run based on a hex-grid system.
When the Lorian people go bad, they become corrupted. Driven by greed and the desire for gold, everything within their environment becomes dark and twisted. Here is a first look at what 'The Corrupted' might look like.