Cataclysm: Dark Days Ahead (aka Cataclysm DDA or CataDDA) is an open source roguelike set in a post-apocalyptic and fictional New England. It's a continuation of Whale's original Cataclysm, which expands it with numerous new creatures, buildings, gameplay mechanics and many other features. Surviving is difficult: you have been thrown, ill-equipped, into a landscape now riddled with monstrosities of which flesh eating zombies are neither the strangest nor the deadliest. Yet with care and a little luck, many things are possible. You may try to eke out an existence in the forests silently executing threats and providing sustenance with your longbow. You can ride into town in a jerry-rigged vehicle, all guns blazing, to settle matters in a fug of smoke from your molotovs. You could take a more measured approach and construct an impregnable fortress, surrounded by traps to protect you from the horrors without. The longer you survive, the more skilled and adapted you will get.