Guide:Mod progression

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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.


Getting Started


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 that may be useful.
  • Several new structures spawn across the world:
    • Planetoids spawn in Space, providing items which were otherwise available only in the Caverns. These structures can provide huge benefits to the player, especially if explored early.
      • The main Planetoid contains the Space Arsenal Lab that contains Cinderplate and chests with Herb Bags, Planter Boxes, Dubious Plating and Mysterious Circuitry. This allows the player to set up an early herb farm.
      • Ore planetoids can be generated, providing the player with a large amount of a random ore, which is useful for early crafting, especially for Gold or Platinum armor.
      • Biome planetoids can be useful for obtaining items prior to exploring their respective biomes, most notably Bezoars, Sharpening Stations and Glowing Mushrooms.
      • Life Crystal planetoids are guaranteed to generate with a Life Crystal inside of them, and typically contains a vein of a random type of gem.
        • These planetoids, especially if Rubies are generated, will allow the player to obtain a large amount of Life Crystals early, helping them to increase their maximum life very quickly.
    • Shrines appear in different biomes, each with a unique accessory or mount for the player to use.
    • An Evil Island spawns in the sky above either the Dungeon or the Jungle, comprised of blocks and ore from the World Evil that is opposite to the one chosen during world generation, as well as its Biome Chest.
  • Certain enemies drop vanilla items for convenience:
  • NPCs also sell new items, including a variety of buff potions.
  • Enemies during Blood Moons drop Blood Orbs, which are a universal material for crafting potions, but require the Alchemy Table from the Dungeon in order to be used.


  • 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 utilizes a unique 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 they can, the player should head to the Desert or Underground Desert 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 should make new weapons and armor with Sea Remains.
  • The player may also visit the Sunken Sea for more loot.
    • 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.
  • Although not immediately useful, it is recommended that the player looks for the Sunken Sea Bio-center Lab with the Cyan Seeking Mechanism and takes the loot within.
    • The Lab Turrets can be dangerous and are immune to normal weaponry, though they can be destroyed with a pickaxe. The player should build a barrier to block their line of fire while they explore the lab.
    • The Schematic (Sunken Sea) will unlock powerful weapon recipes for later.
    • The player should also look for Power Cell Factories to place near their base so they can start producing Draedon Power Cells for later.
    • The player should also take two Charging Stations. One to create a Codebreaker with and another to recharge any chargeable weapons the player crafts.
  • 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 duration of the Rage Mode buff by 1 second.
  • 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 player can now craft the recipes contained within the Sunken Sea Schematic.

Late boss progression

  • The next goal of the player should be to fight Skeletron and visit the Dungeon.
    • The Bandit NPC can now spawn, selling various Rogue weapons and accessories.
      • The Bandit also provides the refund service which returns a fraction of the money the player has spent at the Goblin Tinkerer on reforging.
    • 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.
  • After rescuing the Mechanic, the player can buy Wire to craft the second Codebreaker component, the Decryption Computer which decodes the Encrypted Schematic (Planetoid) and unlocks various early-Hardmode weapons.
  • 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.
  • The player can attempt to explore the Brimstone Crag at this point and use the Shadow Key to loot the Shadow Chests within, though they should be wary of the powerful enemies that spawn in this biome.
  • Afterwards, the player can challenge The Slime God.
    • While this boss can be skipped and fought later, the loot and the crafted Statigel set is valuable in the upcoming fight against the Wall of Flesh.
    • 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.
    • Aside from new weapons, the boss also drops a Rogue Emblem for the rogue class.


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. These bosses are not required for progression, but the gear they drop and unlock can aid in the upcoming fights. Note that the Brimstone Elemental requires the defeat of one mechanical boss.
    • Defeating Cryogen spawns Cryonic Ore in the Ice biome for the Daedalus set. Note that an Adamantite or Titanium Pickaxe is needed to mine the ore, requiring the defeat of 2 mechanical bosses.
      • The Archmage NPC spawns as well and sells various items and weapons.
    • Defeating Aquatic Scourge unlocks the second tier of the Acid Rain.
      • This tier unlocks new weapons for the player to aid in the upcoming fights.
    • The second tier of the Old One's Army may also be fought, as the Sentry accessories are recommended for Summoners.
  • If the early Hardmode progression rework is enabled, Mechanical Bosses will no longer drop Hallowed Bars at first and defeating Mechanical Bosses will cause various ores to spawn in the world.
    • Mythril Ore and Orichalcum Ore will spawn upon the defeat of the first Mechanical Boss, allowing the player to craft a Mythril or Orichalcum Anvil.
    • Adamantite Ore and Titanium Ore will spawn upon the defeat of the second Mechanical Boss.
    • Hallowed Ore will spawn in the underground Hallow following the defeat of the final Mechanical Boss, and all Mechanical Bosses will drop Hallowed Bars from that point onward.
  • As soon as Mythril or Orichalcum Bars are available, the next Codebreaker component, the Long Ranged Sensor Array, can be crafted to decrypt the Encrypted Schematic (Jungle).
  • The souls dropped by the Mechanical Bosses along with Mythril or Orichalcum Bars can be used to craft the weapons from the Planetoid Schematic.
  • The Blood Orange may be crafted following the defeat of the 3 Mechanical Bosses. When consumed, it permanently increases the player's life by 25.
  • After all six bosses have been defeated, the player is recommended to fight either Calamitas or Plantera.
  • After defeating Calamitas, Solar Veils will drop from certain enemies during a Solar Eclipse and the middle area of the Abyss may now be explored, in order to hunt for Depth Cells, Lumenyl, and dig for Tenebris.
    • The player very careful within this area of the Abyss, as enemies can very easily overpower them, and the lack of significant lighting can make escaping the Abyss difficult under pressure.
    • The materials here are used in gear both now and later on.
    • As the breath loss increases as the player goes deeper into the Abyss, accessories such as the Abyssal Diving Gear and the Aquatic Emblem are highly recommended from this point onwards.

Post-Plantera boss progression

Post-Moon Lord

Post-Providence, the Profaned Goddess

  • Uelibloom Ore is now available, allowing the Player to obtain Tarragon armor.
  • The items in the Underworld Schematic can now be crafted, including the next Codebreaker component, the Voltage Regulation System, which allows the decryption of the final schematic, Encrypted Schematic (Ice).
  • An Elderberry can now be crafted which further again increases the player's max life by 25 HP.
  • Ravager, 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.
    • The Brimrose can now be crafted with Bloodstone and Unholy Cores, which is a powerful mount that allows for infinite flight.
    • The Ravager will also now drop the Bloodflare Core.
  • Providence will drop the Rune of Kos, which is used to fight the three Sentinels of the Devourer.
  • Polterghast is now recommended to be fought, and upon its death, the abyssal mini-bosses will now drop new items, allowing the player to obtain several powerful weapons and accessories.
    • After defeating Polterghast, the player 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.
  • The can 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 and the Exo Mechs have 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, many things will happen:
  • Now, Jungle Dragon, Yharon should be challenged.

Post-Jungle Dragon, Yharon

Post-Supreme Calamitas/Exo Mechs

  • The Brimstone Witch NPC can spawn once Supreme Calamitas is defeated. She can enchant the player's weapons to give them new and powerful effects.
  • Upon defeating the Exo Mechs, Exo Prisms will be dropped and Miracle Matter can be crafted, allowing the to player combine the Ancient Manipulator, Cosmic Anvil, Hardmode Forge, and Tinkerer's Workshop to obtain Draedon's Forge and craft several Exo-Weapons.
  • Materials dropped by both Supreme Calamitas and the Exo Mechs allow for Shadowspec Bars to be crafted, used to craft endgame-tier items, allowing the player to obtain Demonshade armor, it is at this point that the player should be strong enough 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.
  • While optional, the player can head to the Abyss and attempt to fight the Adult Eidolon Wyrm.

The Endgame

After the player defeats the Boss Rush (and optionally the Adult Eidolon Wyrm), 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:

  • Start a new playthrough in higher difficulty (Normal Mode < Expert Mode < Master Mode < Revengeance Mode < Death Mode), and Infernum Mode, which is a community mod maintained by Dominic Karma that increases the difficulty of the game.
  • Change the health of bosses in the mod's config.
  • 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.
  • Learn speedrunning.
  • Create pixel art of content added by the Calamity Mod.
  • Acquire every single weapon and tool.
  • Obtain every single armor and vanity set.
  • Gather up every single accessory.
  • Collect every single Trophy, Boss Mask and Banner.
  • Collect every Relic if playing on Master Mode or Revengeance Mode.
  • Gather up every single Music Box.
  • Mine out every single ore that the Calamity Mod adds.
  • Suggest ideas in the Calamity Mod Discord.
  • Find bugs and glitches so the mod developers can fix them for everyone's benefit.
  • 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 Yharim himself.

See Also