So not only are weird glitches possible, but you'll risk save data being corrupted, losing progress, and various other issues by playing the alpha at all. Make sure to remember that even mods updated to 1.4 won't work perfectly, because the build of tModLoader being used is old, an alpha, and still actively in development. You'll naturally need Terraria 1.4 to use this, and you'll need to find working mods to use. You actually access the alpha as a fork of the tModLoader build available on Steam, and through Steam's 'beta build' function, you can opt to download the tModLoader 1.4 public alpha.
It's only 'available' on the tModLoader Discord in the sense that the instructions for how to access the alpha are on the Discord.
However, if you can't wait or simply don't mind a buggy, usntable experience with limited mod support, you can download the tModLoader 1.4 alpha right now. Related: Can You Play Minecraft On Steam Deck? Java and Bedrock? It's almost important to realize that big mods, by the tModLoader team's own admission, will take a long time to update, so even if devs do have early access to tModLoader, it doesn't mean the biggest overhaul mods will make it out with the release of tModLoader 1.4. There's also reason to believe that when tModLoader 1.4 does drop there will be a god portion of Terraria mods that get updated immediately or go live with the update, because the alpha release has been successful in allowing mod developers to work on their mods as tModLoader itself is worked on. There are a lot of new bosses in the Calamity mod, and we mean a lot. Related: How to Fix Minecraft RTX Not Working For a step-by-step process, TheGamer has a handy how-to for installing Terraria mods. This functionality will work just like how it works for the current version of tModLoader on the Workshop. When tModLoader is properly updated, you'll be able to access it through the Workshop as well as find and download mods with just a single click through the Workshop. But when it does come, it will be easy to use, because tModLoader is supported on the Steam Workshop. So, it's still probably going to be a while before you can fully kit out your ideal modded Terraria 1.4 experience, even if everything goes well. Will you delve deep into cavernous expanses in search of treasure and raw materials with which to craft ever-evolving gear, machinery, and aesthetics Perhaps you will choose instead to seek out ever-greater foes to test your mettle in combat Maybe you will decide to. And inevitably, some mods will get lost to time. Terraria - Dig, Fight, Explore, Build: The very world is at your fingertips as you fight for survival, fortune, and glory. Like in every modding community, some mods will get updated almost immediately, and others will take much, much longer. We don't have a release date for tModLoader 1.4, and even when it does finally arrive, mods themselves will need to be updated to support 1.4. However, it's not all smooth sailing ahead.