NOOOOO im broke:( i used to play the catacombs for ages and wanted something like this, but its not free :(
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consider this, the og was probably a passion project or was for a game jam, the dev didn't have to make a sequel that probably took a long time to make with better visuals and new features, but he did anyway, and considering the time to make this, $12 USD is a bargain, and if you don't have the money to buy it, that's alright, at least you still have the og one for free.