Cataclysm: Dark Days Ahead (CDDA) is a turn-based survival horror roguelike. Released in 2013, CDDA receives regular community updates to this day and can be freely downloaded from GitHub. This game sees players thrust into a world destroyed by simultaneous apocalypses. From aliens to zombie hordes to eldritch horrors, all manner of monstrosities can be found in this terrifying world. The only goal is survival, and death is guaranteed.