Users can create their own modifications by writing plugin code. It can be downgraded to '1.3-legacy' ( Terraria 1.3.5.3), to play older mods.
The latest version of tModLoader is 2022.9.47.xx and it works with Terraria 1.4.3.6. It is officially endorsed by Re-Logic and is available through Steam. tModLoader is a framework and client for creating and loading complex Terraria modifications.
