Best Terraria Mods: 12 Worth Installing in 2026

Terraria is one of the best games ever made for replaying, and mods are a big reason why. A good mod list can double the number of bosses, add whole new classes, or simply remove the small annoyances you've put up with for years. This list covers the mods that have earned their place, from huge content overhauls to small quality-of-life fixes. It ends with how to run them on a multiplayer server so your whole group plays the same game.

First, a word on tModLoader and Terraria 1.4.5

Almost every Terraria mod runs on tModLoader, the free community mod loader. It is a separate entry in your Steam library, free if you own Terraria, and it keeps its own saves apart from the base game.

There is one thing to know right now. Terraria 1.4.5 came out in January 2026, but tModLoader's stable releases are still based on Terraria 1.4.4. A 1.4.5 version of tModLoader is being worked on as a Steam beta, but it isn't the stable release yet. Every mod below runs on the current stable tModLoader. In practice this means:

• Your modded game won't have the 1.4.5 content, such as the new housing rules and crossover items, until tModLoader catches up.
• A world saved in vanilla 1.4.5 won't open in tModLoader. Start a fresh world for your modded playthrough, or use a world from before 1.4.5.

The big content mods

1. Calamity Mod

The most popular Terraria mod by a long way, with millions of subscribers on the Steam Workshop. Calamity adds dozens of new bosses, new biomes, a mountain of weapons and accessories, and a long stretch of post-Moon Lord content. It also adds two harder difficulty modes, Revengeance and Death, which change how bosses behave instead of just inflating their health.

Install Calamity Mod Music alongside it. The soundtrack is kept in a separate mod to keep the main download smaller, and it is a large part of what makes Calamity feel special.

2. Thorium Mod

Thorium takes a "vanilla plus" approach. Instead of a harder game, you get a bigger one that still feels like Terraria. It adds over 2,700 items, new bosses spread across the whole progression, and three new classes: Bard, Healer and Thrower. The Healer class in particular is a great fit for multiplayer groups, because it gives one player a genuine support role.

Calamity and Thorium can run together, and plenty of groups play both. Expect a long playthrough and plan your server memory accordingly (more on that below).

3. Fargo's Mutant Mod and Fargo's Souls Mod

Fargo's Mutant Mod adds NPCs who sell boss and event summoning items once you've beaten them, which makes farming bosses for drops painless. It also makes large stacks of ammo and potions effectively endless, and adds plenty of other conveniences.

Fargo's Souls Mod is the challenge side. It adds Eternity Mode, which reworks every boss with new attacks, and the Souls and Forces, powerful accessories crafted by combining whole sets of gear. If your group has already beaten Master Mode, this is the next step.

Quality of life mods

4. Magic Storage

The best answer to "which chest did I put that in?". Magic Storage replaces rows of chests with a storage network: a Storage Heart, storage units that hold the items, and an access point that searches everything at once. Its crafting interface crafts straight from your stored items, so you never have to fetch ingredients again. On a server, it turns a shared base into a shared warehouse.

5. Recipe Browser

Look up any item to see how to craft it, what it is used for, and which items you can make right now from what you are carrying. It saves countless trips to the wiki, and it becomes essential once Calamity or Thorium add thousands of new recipes.

6. Boss Checklist

A checklist of every boss and event in progression order, including the ones mods add, with what summons each one and what it drops. In a modded playthrough with fifty-plus bosses, this is how your group keeps track of what comes next.

7. AlchemistNPC Lite

Adds a set of vendor NPCs who sell potions, materials and other useful items, which takes the grind out of preparing for a boss. Make sure you get the Lite version: it is the one that was ported to current tModLoader, while the original AlchemistNPC was not.

8. Census - Town NPC Checklist

Shows which town NPCs have moved in and what each missing one needs before it will arrive. Small, but it saves a lot of guessing, especially with modded NPCs that have their own conditions.

9. Wing Slot Extra

Gives wings their own equipment slot, which frees up an accessory slot for something else. It is one of those changes that feels so natural you'll wonder why it isn't in the base game.

10. Quality of Terraria

A large bundle of small improvements to building, inventory, fishing and more. Nearly all of them can be switched on or off in its settings, so you can keep the parts you like.

11. Auto Trash

Tell it which items you never want, and it bins them as you pick them up. Brilliant for long mining trips, when your inventory would otherwise fill with stone and gel.

12. Calamity's Vanities

Purely cosmetic: vanity outfits and pets themed around Calamity's bosses. A nice extra for groups that care about how their characters look in screenshots.

A note on Infernum

Infernum was a popular add-on that made Calamity's bosses much harder. Its developers have frozen it on the current tModLoader version and said it won't be updated for 1.4.5, because Calamity is reworking its bosses. If your group is starting a long playthrough now, check that it still works with your Calamity version before relying on it.

How to choose your mod list

• First modded playthrough: Thorium plus the quality of life mods. It feels like more Terraria rather than a different game.
• Experienced group wanting a challenge: Calamity on Revengeance, with Boss Checklist and Recipe Browser.
• Boss rush: Fargo's Mutant Mod to summon bosses on demand, and Fargo's Souls for Eternity Mode.
• Just smoother vanilla: Magic Storage, Recipe Browser, Wing Slot Extra, Census and Auto Trash. No new content, just fewer chores.

Pick your list before you create the world. Some content mods generate ores and biomes when a world is created, so adding them halfway through can leave you without parts of the mod.

Running Terraria mods on a multiplayer server

On a server, tModLoader works much like it does on your PC. The server needs the same tModLoader version and the same mods as your players. Here is how to set that up on a CloudNord Terraria server.

Switch the server to tModLoader

Open your server, go to Change Runtime and choose tModloader. Take a backup from User Backups first. Your worlds are kept in saves/Worlds, and the old server files are moved into a runtime-switch-backup folder rather than deleted. Remember that a vanilla 1.4.5 world won't open in tModLoader, so a fresh world is usually the cleanest start.

Get the mods onto the server

1. In tModLoader on your PC, enable exactly the mods you want, then go to Workshop, Mod Packs and choose Save Enabled as New Mod Pack. This creates a mod pack folder containing an enabled.json file that lists your enabled mods.
2. Find the .tmod files. Workshop mods are stored in your Steam library under steamapps/workshop/content/1281930/, one folder per mod, with the .tmod file inside a version folder.
3. Stop the server, open the Files tab and go into the mods folder. Upload the .tmod files and the enabled.json file. For a big list, SFTP is quicker. The SFTP page has your login details.
4. Start the server and watch the Console tab. tModLoader lists each mod as it loads, and names any mod that fails.

Without enabled.json, the server loads the files but enables none of them, which is the most common reason for a "modded" server that plays like vanilla.

Getting players connected

Players join through tModLoader's Multiplayer menu, using Join via IP with your server's address and port. Any mod the server has and they don't can be downloaded from the server when they join, but that is slow for big mods like Calamity. It is much faster for everyone to subscribe to the same mods on the Workshop first, or import the mod pack you made.

Everyone also needs the same tModLoader version as the server. Steam updates players' tModLoader automatically, so if people suddenly see a message saying they aren't on the same version as the server, the server has fallen behind. The version is set in the Startup tab (tModloader Version). Message our support team and we'll move the server to the matching build with your world and mods kept.

How much memory does a modded server need?

Vanilla Terraria is light, and a few quality of life mods barely change that. Content mods do. As a guide, a moderate mod list for up to eight players sits comfortably on about 4 GB. Calamity or Thorium on a large world with a full group is happier at 6 to 8 GB. Add the memory before you add the mods. A server running short shows it as rubber-banding and long pauses when new areas load.

Frequently asked questions

What is the most popular Terraria mod?

Calamity, by a wide margin. It has more Workshop subscribers than any other tModLoader mod.

Do Terraria mods work on 1.4.5?

Not yet on the stable tModLoader, which is still based on Terraria 1.4.4. A 1.4.5 version of tModLoader is in beta. The mods in this list all work on the current stable release.

Can I play Calamity and Thorium together?

Yes, and many groups do. The playthrough gets very long, and your server needs more memory.

Do my friends need the same mods?

Yes, at the same versions and on the same tModLoader version. tModLoader can download missing mods from the server when they join, but having everyone subscribe in advance is faster.

Can I add mods to an existing world?

Quality of life mods, yes. Content mods will work, but anything they generate when a world is created, such as new ores or biomes, may be missing. A new world gives the intended experience.

Does a vanilla server work with tModLoader?

No. Modded players need a tModLoader server, and vanilla players need a vanilla or TShock server. You can switch a server between them from Change Runtime.

Start your modded Terraria world

Whichever list you choose, it is best played with friends on a world that is always online. Our Terraria server hosting runs vanilla, TShock or tModLoader, and you can switch between them from the Change Runtime page. Want to know what changed in the base game? Our Terraria 1.4.5 update guide covers it.