It’s no secret thatTerrariahas an impressive and thriving modding community. While discussing all the mods worth checking out would be impossible, it’s worth highlighting one of the largest: the Calamity Mod. This gigantic mod adds hours of new content in the form of items, bosses, and more, including content past the base game’s final boss.

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This guide aims to help players get started with this mod, including offering installation instructions and discussing some important changes to gameplay and progression.

Default Terraria player gliding with wings, with the Ankh Shield, Destroyer Emblem, Terraspark Boots, and Celestial Shell behind them.

The research for this article was greatly simplified by the helpful community behind this mod, primarily through talking to players on the Calamity Mod Discord and reading through the well-maintainedOfficial Calamity Mod Wiki.

Installation

If you haven’t played some of the larger overhaul-style mods for Terraria, you may find the way to actually play Calamity to be a bit unintuitive. This is because it isn’t done through Terraria’s Steam Workshop. It’s also important to note that this mod (and, practically speaking, all mods) cannot be played on console versions of the game.

The intended way to play Calamity is to first install tModLoader on Steam, found through the Steam store. This is a free, open-source modification and expansion of Terraria designed to make modding the game easier.verify you also have Terraria installed, or it won’t work.While perhaps less optimized than the base game, this mod isfairly easy to runon any modern machine, although some very busy boss fights might cause slowdown.

A splash page for tModLoader

At this point, you’re able to open tModLoader. The loader will open a Command Prompt (black box), which you can generally ignore but must leave open, and otherwise will look like an ordinary launch of Terraria.Once open, click the in-game Workshop button and enable both the Calamity Mod and Calamity Mod Music options.Once enabled, you just need to make a character and world to start playing.

Difficulty Selection

Immediately, Calamity has some key differences to keep aware of. This is a mod with highly customizable difficulty.The intended play experience is setting a world to Expert difficulty with Revengeance mode (explained soon) activated.Don’t assume the difficulty options are especially similar to those in the base game, despite having the same names.

While you may obviously select whatever difficulty option you want, almost all items are available if you choose Expert and then activate Revengeance mode, with the game largely tuned around this play experience. Unlike the base game, Master mode is amuchbigger difficulty jump, intended for extremely hardcore players.

The Rage Bar from Terraria’s Calamity Mod.

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Once you spawn into a world, you will want to consider immediately activating Revengeance mode (assuming you set the world difficulty to Expert or Master).This is done by opening your inventory menu and clicking the hexagonal difficulty modifier added to the menu. You will be presented with three options, with the Revengeance and Death modes only available if the world is set to Expert or harder:

A player hovering over the Onyx Excavator Key as they drive the excavator leftward.

If playing with Revengeance or Death mode activated, verify to bind your Adrenaline and Rage keys so you may utilize these buffs.In testing, these keys started unbound, but the game suggests they be bound to the V and B keys, which should work well for most mouse and keyboard players.

Jumping In

At this point, you are now free to play Calamity. While it’s impossible to cover all the changes this mod makes to the standard experience, early game progression has a few major changes you should be aware of, including a new boss. Some highlights of note include:

Even experienced players will likely need to relearn bits and pieces of how they typically play to adapt to some of the balance changes the mod makes, the many items it adds, and both its brand-new bosses and modified old ones.

A Bio-center Lab at the Cavern Layer

Experiment, Explore, and Research

Terraria is already a very open-ended experience and Calamity only adds to that open-endedness, adding significant variety at almost all tiers of play such that you’ll almost inevitably progress past some items being viable before you even learn they exist. You should get in the mindset that you should be constantly exploring what options are available to you and experimenting to see what works best (or even just what you find to be the most fun).

Because the mod adds such a wide breadth of content, you also may want to research what is available to you even when you might normally want to avoid spoilers. It’s easy to miss new options and fall into doingwhat originally worked in the base game. You can also join the community’s thriving Discord server to ask questions of players and developers directly (just verify you read the rules of the server first so that everyone involved can have the best experience).

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