Takes an already gigantic, power trippy game and cranks it up to 13. More bosses, harder bosses, harder and more meaningful difficulty settings, gargantuan crafting trees that combine into accessories with 20 different tooltips, weapons with damage values in the thousands with unique abilities so cool I find myself fantasizing about using them before the fact, and some of my favorite bosses of all time. Regular Terraria makes you feel like a badass but Calamity makes you feel like you could kill god with your bare hands. This intensity extends even beyond the gameplay, as Calamity takes the base game's tepid aesthetic and morphs it into something a lot edgier and more focused with some semblance of interesting lore, really impressive sprite-work, and one of the best soundtracks I've ever heard in any game. It's actually insane how hard DM DOKURO went on every single song in this mod - the endgame especially is just masterpiece after masterpiece - and it contributes so much to making these already difficult and showy fights feel cinematic. Some things in the mod can feel kind of uninspired, and (much like the base game) there are irritating moments and content that can feel like bloat, but the experience as a whole is fun enough that I don't really mind. I'll probably play 200 more hours of this every year until I die.