G3M - GameMaker Mod Manager

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G3M (formerly DELTAHUB) is a desktop mod manager for GameMaker games. It brings mod discovery, installation, library management, profiles, patching tools, plugins, and recovery workflows into one app.

The main and always up-to-date project description lives on GitHub, while this GameBanana page focuses on the highlights and quick overview.

G3M HIGHLIGHTS:

• Built for both players and modders: G3M is not just a launcher or just a patcher. It covers browsing, installing, launching, editing, converting, packaging, and experimenting with mods in one place.

• PizzaOven, CYOP/AFOM and even manual install support: G3M allows you to easily install PizzaOven mods or even CYOP/AFOM mods by converting them into the G3M format, and if a mod requires very extensive configuration, you can use the manual installation feature, which lets you configure the mod manually and obtain its G3M version.

• GameBanana browsing inside the app: Browse supported games directly in G3M with descriptions, screenshots, metadata, and compatible downloads. Install from GameBanana, local archives, direct URLs, or one-click protocol links.

• Profiles are first-class: Create multiple profiles with separate library state, active mod setups, and launch-related settings. This is perfect for normal playthroughs, testing, challenge runs, or keeping several modpacks ready at once.

• Recovery-friendly workflow: Downloads history, mod versions, and game restore points are built in. You can experiment much more safely without losing track of what changed.

• More than a typical mod manager: G3M includes tools for patch creation and application, patch merging, diff viewing, file comparison, manual install setup, and format conversion workflows.

• Plugin system with real functionality: G3M supports installable plugins, plugin settings, plugin views, lifecycle hooks, compatibility validation, and local plugin support. The current catalog includes the DR Save Manager plugin for DELTARUNE save collection management and save editing.

• Multi-mod and launch flexibility: Use multiple mods together, keep different setups in separate profiles, create shortcuts with saved launch configuration, and use Steam handoff where supported.

• Custom games support: G3M is already focused on DELTARUNE, DELTARUNE Demo, UNDERTALE, UNDERTALE Yellow, Pizza Tower, and Sugary Spire, but it is also designed to grow beyond them through the built-in Game Manager. You can add games, hide, change other, add Steam ID or Gamebanana Game ID to add Steam Launch or Mods Browser to them.

• Customization and localization: Themes, background media, UI scale, bundled and external language files, and other appearance settings are supported directly in the app.