Guide:Mod progression

This is a guide intended to give a rough outline of progression through the Calamity Mod. The mod adds several new points of progression and makes several changes to the base game's mechanics as well, which will be mentioned throughout this guide.

Starting

 * The player starts out with several items: the Starter Bag, Iron Heart and Revengeance. The bag contains weapons for each class in the game, as well as Death and the Defiled Rune. Several of these items toggle unique difficulty modes:
 * Revengeance Mode and Death Mode are difficulty settings intended to be much more challenging than Expert Mode, introducing mechanics such as the Rage Meter and Adrenaline Meter, and new boss mechanics.
 * The Defiled Rune disables the player's flight time and allows enemies to critically hit the player, in exchange raising the drop rates of certain items to.
 * The Iron Heart toggles a mode that prevents natural life regeneration, consumption of Recovery Potions, and increases damage taken depending on how much maximum health the player has.
 * Additionally, the Armageddon item may be crafted at an Altar, which allows bosses to instantly kill players in one hit but yields multiple Treasure Bags based on the difficulty mode they are fought in.
 * Certain mechanics featured by the mod can be changed in the configuration options file.

Pre-boss exploration

 * Aside from mining for Ores, Wulfrum Metal Scraps and Energy Cores are the first materials the player should look for to create armor and weapons.
 * All Biomes and the majority of Events have unique content added to each of them, so be sure to check through them for items you may find useful.
 * Several new structures spawn across the world:
 * Planetoids spawn in Space, providing items which were otherwise available only in the Caverns.
 * The main Planetoid contains the Space Arsenal Lab that contains Cinderplate and a chests with Planter Boxes, Dubious Plating and Mysterious Circuitry
 * Shrines appear in different biomes, each with a unique weapon, accessory or mount for the player to use.
 * An Evil Island spawns opposite to the dungeon, containing the opposite World Evil and its respective ore, as well as its Biome Chest.
 * Certain enemies drop vanilla items for convenience:
 * Crawlers can be found in subterranean areas, dropping their respective gems.
 * Cosmic Elementals have chances to drop the Bone Sword, Starfury and Arkhalis.
 * A complete list containing all the other available items may be found here.
 * NPCs also sell new items, including summoning items to make re-fighting bosses easier.
 * Enemies during Blood Moons drop Blood Orbs, which make crafting potions easier but require the Alchemy Table from the Dungeon.

Mechanics

 * Killing enemies or damaging bosses yields proficiency, a new leveling system added by the mod. While the system isn't necessary to be able to progress, it grants several minor boosts to the player's stats.
 * The mod also adds a new Rogue class, which revolves around a stealth mechanic to deal extra damage.
 * Several items as well as modifiers have been rebalanced throughout progression.
 * All other changed mechanics can be referred to here.

Early boss progression

 * After obtaining as much loot as you can, you should head to the Underground Desert to acquire the Victide Bar set and fight the Desert Scourge.
 * Cnidrions are large dry seahorse-like enemies which fire a barrage of water bolts. While they are easy to kill by hiding as their bolts cannot penetrate blocks, be wary as they can fall from above and trap the player in confined areas.
 * Stormlions should be slain as they drop Stormlion Mandibles, which are necessary for the boss's summoning item.
 * When the Desert Scourge is defeated, the player may descend farther into the desert to enter the Sunken Sea.
 * In the Sunken Sea, most enemies are largely passive and will not attack the player unless provoked. The Giant Clam is a powerful miniboss that resides in this biome. The Sea King will spawn upon its defeat.
 * The Sea King sells many useful weapons as well as granting the Amidias' Blessing buff allowing underwater breathing.
 * After the Eye of Cthulhu is defeated, Acid Rain may occur naturally and the player is free to challenge its first tier in the Sulphurous Sea.
 * While the event is rather difficult, the Sulphuric Scales dropped by various enemies in the event can be used to craft powerful weapons as well as Sulphurous Armor.
 * While at the Sulphurous Sea, the player can loot Rusty Chests on the seafloor and in the caverns beneath it.
 * The player should be cautious to ensure they don't accidentally enter the Abyss at this point, as they are not yet properly equipped to handle the enemies within.
 * While optional, Crabulon is recommended to be fought at this point.
 * If a Glowing Mushroom biome has not been discovered yet, a Mushroom Planetoid can alternatively be used to build a small arena for him.
 * Aside from the usual weapons, Crabulon also drops a Mushroom Plasma Root in Revengeance Mode, which increases the damage of the Rage Mode buff by 15%.
 * After defeating the Eater of Worlds/Brain of Cthulhu (and optionally, Queen Bee and the Old One's Army), The Hive Mind/The Perforators can be challenged.
 * The two are initially summoned by destroying either a Hive Cyst or Perforator Cyst depending on the boss.
 * Defeating either one will generate Aerialite Ore in the world and cause Aero Slimes to spawn in the Cavern layer. This is used for the Aerialite set, which will also require Clouds, Sunplate Blocks, and the Sky Mill to craft.
 * Since the Security Turrets require a Gold/Platinum Pickaxe to be destroyed, the player may now explore the Arsenal Labs to get access to some of Draedon's Arsenal.

Late boss progression

 * The next goal of the player should be to fight Skeletron and visit the Dungeon.
 * The Shadow Key will be required during the trip to the Abyss, so the player should prioritize finding it upon entering the dungeon. Alternatively, the player can craft a Shadow Key with a Golden Key, Obsidian, and Bones.
 * The Abyss is a large biome which sits right next to the Dungeon. While optional, it contains valuable loot which will prove to be useful against the next pair of bosses.
 * The player should build a house with a bed near the area, for the sake of convenience.
 * The entrance to the biome is located at the very bottom of the Sulphurous Sea.
 * Using the Shadow Key, the Shadow Chests should be opened to obtain several weapons, accessories and other helpful tools.
 * Entering the deeper parts is not recommended due to the multiple powerful enemies that may spawn in the area.
 * Afterwards, the player may be able to defeat The Slime God.
 * While this boss can be skipped and fought later, the loot and the crafted Statigel set is considered valuable against the final boss of this section of the game.
 * The boss also drops the Electrolyte Gel Pack in Revengeance Mode, which increases the damage of Adrenaline Mode by 15% and increases how much damage reduction the player gains when hit while the meter is full by 5%.
 * The last step is to prepare for and defeat the Wall of Flesh, and then enter Hardmode.
 * Be wary as the mod changes lava mechanics, buffing the hazard and removing full immunity. If this is not preferred, the player may disable this in the configuration options.
 * Aside from new weapons, the boss also drops a Rogue Emblem for the rogue class and a Demon Trophy which multiplies the world's enemy spawn rates by 1.25.
 * The player should be cautious to ensure they don't accidentally enter the Brimstone Crag at this point, as they are not yet properly equipped to handle the enemies within.

Hardmode

 * Multiple Hardmode drops such as the Rod of Discord may now be crafted through fishing or dropped more frequently using the Defiled Rune.
 * Several vanilla bosses have been made non-linear in progression:
 * Plantera can be fought early by crafting the Portabulb.
 * Plantera's Bulb also spawns before all mechanical bosses have been defeated.
 * The Temple Key can now be crafted before Plantera is defeated, and Golem can be summoned early as well with the Old Power Cell.
 * The Lunatic Cultist can be summoned pre-Golem via the Eidolon Tablet.
 * The Steampunker NPC spawns as soon as Hardmode begins, making the Clentaminator available earlier.
 * The Drunk Princess NPC will move in if the player has Fabsol's Vodka in their inventory.
 * The Cloud Elemental and Earth Elemental now spawn in Space and the Cavern layer, serving as hazards to the unsuspecting player.
 * New enemies spawn in the Sunken Sea and the Giant Clam miniboss is buffed, gaining new attacks as well as dropping Mollusk Husks.
 * The Astral Infection spawns into the world, featuring powerful enemies which drop Stardust which may be used for the Comet Shard which increases mana by 50 as well as other items.
 * Three new essences are available in Space, The Underworld and the Snow biome which can be used to craft new gear.
 * Aside from consuming Life Fruit, the Blood Orange may also be crafted following the defeat of the 3 Mechanical Bosses. When consumed, it permanently increases the player's health by 25.
 * The Brimstone Crag is intended to be explored at this point.

Early-Hardmode boss progression

 * Three new bosses become available: Cryogen, Aquatic Scourge and Brimstone Elemental. The three of them are fought between each Mechanical Boss fight, but the player may choose to fight them in any order.
 * Defeating Cryogen spawns Cryonic Ore in the Ice biome for the Daedalus set.
 * The Archmage NPC spawns as well and sells various items and weapons.
 * Frigid Bars also allow the player to craft the Moonlight and then the Cosmolight, which gives players control over the day/night cycle.
 * Defeating Aquatic Scourge unlocks the second tier of the Acid Rain.
 * Defeating Brimstone Elemental allows Charred Ore to be mined.
 * The second tier of the Old One's Army may also be fought, as the Sentry accessories are recommended for Summoners.
 * After all six bosses have been defeated, the player is recommended to fight either Calamitas or Plantera.
 * After defeating Calamitas, the middle area of the Abyss may now be explored, in order to hunt for Depth Cells, Lumenyl, and dig for Tenebris.
 * Be very careful within this area of the Abyss, as enemies can very easily overpower you, and the lack of significant lighting can make escaping the Abyss difficult under pressure.

Post-Plantera boss progression

 * The Great Sand Shark may now spawn during a Sandstorm, providing Grand Scales that are used to craft items.
 * The Armored Digger may appear in the Cavern layer, posing as a possibly dangerous threat.
 * It drops Draedon's Remote, which summons the Mechanical Boss trio with buffed stats.
 * Solar Veils are now dropped by certain enemies during a Solar Eclipse.
 * Enemies within the Dungeon now drop Ectoblood, which makes farming for Ectoplasm significantly easier.
 * The next bosses to fight are Leviathan and Anahita and Astrum Aureus.
 * Defeating Astrum Aureus causes the Astral enemies to gain increased stats and drop unique weapons.
 * The Astral Biome Chest also unlocks in the Dungeon, providing the Rogue class its own unique weapon, the Heavenfallen Stardisk.
 * In Revengeance Mode the Starlight Fuel Cell is dropped, which increases the damage of Adrenaline Mode by 15% and increases how much damage reduction the player gains when hit while the meter is full by 5%.
 * After Golem is defeated, the player may visit the Abyss again to mine for Scoria Ore for the Hydrothermic set.
 * Players may now fight the final tier of the Old One's Army to obtain powerful upgrades, including Vesuvius in Revengeance Mode.
 * The Miracle Fruit may also be crafted, increasing the player's health by 25.
 * Several plague-related enemies including the Plaguebringer miniboss also begin to spawn in the Jungle, providing Plague Cell Canisters.
 * The player may then fight The Plaguebringer Goliath, Duke Fishron, Ravager and the Lunatic Cultist afterwards.
 * Ravager drops the Infernal Blood in Revengeance Mode, increasing Rage Mode damage by 15%.
 * Although the first three are not strictly necessary for mod progression, they are recommended to be fought in the order of Calamity's boss progression and the Boss Checklist Mod.
 * Before fighting Moon Lord, the player can use a Titan Heart or Starcore at the Astral Beacon to summon and fight Astrum Deus.
 * Defeating Astrum Deus allows the player to mine the Astral Ore at the meteor in the biome and craft weapons as well as the Ethereal Core, boosting the player's mana by 50.

Post-Moon Lord

 * Upon defeating the Moon Lord, several things will occur:
 * Moon Lord drops a Celestial Onion, which increases the player's accessory slots by one, like the Demon Heart.
 * Several items can now be crafted with Luminite:
 * Many elemental themed weapons for all five classes can be obtained, along with new accessories.
 * Empyrean armor can be made as a Rogue alternative to the Lunar Fragment armors.
 * In Revengeance Mode, Astrum Aureus will be buffed and additionally drop the Suspicious Looking Jelly Bean mount.
 * Several Profaned enemies will begin to spawn in both the Hallow and Underworld biomes.
 * Phantom Spirits will begin to spawn in the Dungeon, similarly to Dungeon Spirits, that drop Phantoplasm which can be crafted into Supreme Mana Potions.
 * Exodium Clusters will begin to spawn on Planetoids that can be used to make extremely powerful accessories.
 * The Profaned Guardians, The Dragonfolly, and Polterghast can now be challenged, although it is recommended that Polterghast be fought later on.
 * Defeating the Dragonfolly will grant access to Effulgent Feathers, which can be crafted into the Dragon Egg that is used to summon Jungle Dragon, Yharon, although it is highly recommended that the Player waits to fight him until The Devourer of Gods has been defeated.
 * The Red Lightning Container is dropped by the Dragonfolly in Revengeance Mode which is the third and final Rage upgrade, increasing Rage Mode damage by 15%.
 * The Rune of Kos can be crafted that is used to summon the three Sentinels of the Devourer, although it is also recommended that they are fought post-Providence.
 * Once The Profaned Guardians are defeated, they will drop a Profaned Core, which is used to summon Providence, the Profaned Goddess.
 * Providence, the Profaned Goddess can drop different loot depending on if you summoned her within The Hallow or within The Underworld.

Post-Providence, the Profaned Goddess

 * The Uelibloom set is now available, allowing the Player to obtain Tarragon armor.
 * An Elderberry can now be crafted which further again increases the player's max life by 25 HP.
 * Several previous bosses, as well as enemies in the Brimstone Crag, become buffed and will now drop Bloodstone, allowing the player to create some of the items in the Bloodstone set.
 * In Revengeance Mode, the Brimstone Elemental will also now drop the Brimrose, which is a powerful mount that allows for infinite flight.
 * The Ravager will also now drop its Expert mode item, the Bloodflare Core.
 * Providence will drop the Rune of Kos, which is used to fight the three Sentinels of the Devourer.
 * Storm Weaver is fought in Space.
 * Ceaseless Void is fought in the Dungeon.
 * Signus, Envoy of the Devourer is fought in the Underworld.
 * Polterghast is now recommended to be fought, and upon its death, the bottom layer of the Abyss will open up, allowing the player to obtain several powerful weapons and accessories.
 * After defeating Polterghast, you can fight the 3rd tier of Acid Rain and challenge The Old Duke.
 * Polterghast will drop the final Adrenaline upgrade in Revengeance Mode, the Ectoheart, which increases the damage of Adrenaline Mode by 15% and increases how much damage reduction the player gains when hit while the meter is full by 5%.
 * Polterghast will also drop Ruinous Souls, which is used to craft Bloodflare armor, Omega Blue armor, several additional weapons, and the Phantom Heart, which is the final mana upgrade.
 * You can now find the Terminus item at the bottom of the Abyss, which starts the Boss Rush event, although it is recommended that this be challenged once Supreme Calamitas has been defeated.
 * Upon defeating all three Sentinels of the Devourer, the Cosmic Worm can now be crafted, which is used to summon The Devourer of Gods.

Post-The Devourer of Gods

 * After defeating The Devourer of Gods, both the Frost Moon and the Pumpkin Moon are immensely buffed, with certain enemies now dropping Endothermic Energy and Nightmare Fuel respectively.
 * After fighting one of the buffed moons, several weapons can be crafted with Cosmilite and Endothermic Energy / Nightmare Fuel which can help when fighting the second buffed moon.
 * Combining Cosmilite Bars, Endothermic Energy, Nightmare Fuel, and the Hardmode crafting stations, the Draedon's Forge can be crafted, which will grant the player access to the many high tiers of items available in the Calamity Mod.
 * With this, God Slayer armor as well as the Cosmilite set can now be crafted, as well as several powerful accessories and weapons.
 * Now, Jungle Dragon, Yharon should be challenged.

Post-Jungle Dragon, Yharon Phase 1

 * Once Yharon reaches 10% health, he will fly away and leave some of his drops.
 * Additionally, the Solar Eclipse is massively buffed, with enemies now dropping Darksun Fragments.
 * Darksun Fragments are used to create Silva armor as well as several new weapons.
 * A Dragonfruit can now be crafted which is the final health upgrade, increasing the player's max life by 25 HP.
 * After collecting some new gear, Yharon should be re-challenged.

Post-Jungle Dragon, Yharon Phase 2

 * Yharon will drop Drew's Wings, allowing the player to trade off sprinting abilities with a massive boost to flight time and acceleration.
 * Auric Ore is now available underground, allowing the player to obtain Auric Tesla armor along with many endgame gear and accessories.
 * The Eye of Extinction can also be crafted, which is used to summon Supreme Calamitas.

Post-Supreme Calamitas

 * The Shadowspec endgame-tier set can now be crafted, allowing the player to obtain Demonshade armor, and can be used to face off against the Boss Rush.
 * Upon defeating the Boss Rush, the player can obtain a special reward, with most playthroughs ending at this point.

The Endgame
After the player defeats the Boss Rush, they are in the endgame now. At this point, the player has several options of where to keep going, including playing other mods or starting over their adventure with the Calamity Mod as a different class.

Some things you can try:


 * Attempt no-hitting all bosses in Revengeance Mode or Death Mode.
 * Complete all Angler fishing quests added by the Calamity Mod.
 * Construct buildings or settings from the Lore such as the Sea Kingdom or the Archmage's castle.
 * Try to beat Revengeance Mode or Death Mode without rage or adrenaline.
 * Beat multiple bosses at once.
 * Defeat the Adult Eidolon Wyrm.
 * Do an Iron Heart playthrough.
 * Learn speedrunning.
 * Create pixel art of content added by the Calamity Mod.
 * Acquire every single weapon and tool.
 * Acquire every single Legendary item and Rare item variant.
 * Obtain every single armor and vanity set.
 * Gather up every single accessory.
 * Collect every single Trophy, Boss Mask and Banner.
 * Play through the entire game on Revengeance/Death Mode with Armageddon and/or Defiled Rune toggled on.
 * Seek out the rarest items in the mod, such as the Halibut Cannon, Yharim's Crystal or Eidolon Wyrm (Juvenile) Banner.
 * Mine out every single ore that the Calamity Mod adds.
 * Suggest ideas in the Calamity Mod Discord.
 * Find bugs and glitches so the mod devs can fix them for everyone's benefit.
 * Defeat bosses with Determination Breaker on.
 * Create a wardrobe of different costumes that resemble certain characters.
 * Dig out every single block in a world.
 * Prepare for future updates.
 * Contribute to the Wiki!

The Calamity Mod is an ever-changing project, with more content to come in the future for both the current progression of the Mod and beyond Supreme Calamitas. The player can prepare themselves for when the mod updates to add bosses and/or events such as Draedon or Yharim himself.