# tModLoader/tModLoader

A mod to make and play Terraria mods. Supports Terraria 1.4 (and earlier) installations

Repository: https://github.com/tModLoader/tModLoader
Canonical: https://ross.abutalabs.com/products/tmodloader
Homepage: https://www.tmodloader.net/
Language: C#
License: MIT
License Family: permissive
Topics: terraria, tmodloader, terraria-modding-api, steam, api, tml, game
Last push: 2026-08-25T23:45:37+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 97, longevity 100
- inputs: {"age_days": 4061, "days_push": 8, "days_rel": 20, "gap_med": 11, "n_releases_24m": 50}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5591, forks 2155 (observed 2026-08-28T04:09:22.695331+00:00)

## What it is
tModLoader is an open-source, community-driven modding API and mod loader for the game Terraria, distributed as a free Steam app. It lets players install and play community mods and provides developers with a framework for creating them.

## Use cases
- play Terraria with community mods
- create custom Terraria mods in C#
- load multiple mods together in multiplayer
- extend Terraria with new items, bosses, and biomes
- distribute Terraria mods via Steam Workshop
- mod a Terraria 1.4 installation

## When to choose
- you want to play or make Terraria mods
- you need a stable, widely-adopted Terraria modding API with Steam integration
- you want to develop mods in C# with community documentation

## When to avoid
- you want to mod a game other than Terraria
- you need vanilla Terraria compatibility with modded players
- you want a general-purpose game engine

## Facets
- artifact type: application
- maturity: active
- function: game-engine, plugin-system, sdk, api-framework
- domain: gaming-tools
- platform: windows, cross-platform
- tags: terraria, modding, mod-loader, game-mods, csharp, steam-workshop, game-development, minecraft, macos, linux, steam

## Member repositories
- tModLoader/tModLoader (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:22.695331+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:55:30.434181+00:00, confidence not recorded.
  - readme: https://github.com/tModLoader/tModLoader (fetched 2026-08-28T04:09:22.695331+00:00, sha 870fd74ce27e)
  - homepage: https://www.tmodloader.net/ (fetched 2026-08-29T08:50:22.327989+00:00, sha 631f7b2e4a52)
- Data as of 2026-08-30T08:39:29.467469+00:00.