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G3M
What it is
G3M is a free desktop manager for browsing, installing, organizing and launching GameMaker mods. Its built-in game list includes DELTARUNE, DELTARUNE Demo, UNDERTALE, UNDERTALE Yellow, Pizza Tower, Sugary Spire and FRICKBEARS3; users can add other GameMaker games through its Game Manager. It browses supported GameBanana games and accepts mods from that service, external URLs, local archives and one-click links. Multiple library profiles can keep their own mod selections and settings. The Mod Editor combines patches, file replacements and archive contents, while other tools create and apply patches, merge patch sets, compare files, export diff reports and convert supported formats. Games can launch directly or through Steam where available; Linux users can use PortProton for compatible Windows games. The Catalog offers plugins and themes, including tools for DELTARUNE saves and custom save folders. Downloads are available for Windows, Linux and macOS on x86_64 and ARM64 computers. The normal launch mode restores game files after the game closes. G3M is GPL-3.0 licensed. Security fixes are best-effort for the main branch and latest release; older releases are unsupported.
For and against
For
- Supports profiles with separate mod selections
- Accepts mods from GameBanana and local archives
- Includes patching and file comparison tools
- Available for Windows, Linux and macOS
- Restores game files after normal launches
Against
- Older releases are unsupported for security fixes
- Built-in entries cover a specific set of games
- Some Linux Windows-game launches require PortProton
The verdict
G3M brings mod discovery, profiles, editing and game launching into one desktop manager. Its built-in game list is specific, though users can add custom GameMaker games.
Who it suits
G3M suits players who manage mods for supported GameMaker games, and users who want separate mod profiles or mod editing tools. It also fits users on Windows, Linux or macOS.
Plans and prices
G3M
GPL-3.0 desktop application
Read 12 Oct 2026 · github.com
On the record
- Catalog
- The Catalog offers plugins and themes, including plugins for managing DELTARUNE saves and choosing custom save folders.github.com · read 11 Oct 2026
- Conflict detection
- Yesraw.githubusercontent.com · read 20 Sep 2026
- Custom games
- Users can add custom GameMaker games through the in-app Game Manager.github.com · read 11 Oct 2026
- Deployment method
- copyraw.githubusercontent.com · read 20 Sep 2026
- Download platforms
- Release downloads are available for Windows, Linux, and macOS on x86_64 and ARM64 computers.github.com · read 12 Oct 2026
- Game file handling
- The normal launch mode restores game files after the game closes.g3m.gitbook.io · read 12 Oct 2026
- Game launch
- Supported games can launch directly or through Steam where available, and Linux users can use PortProton for compatible Windows games.github.com · read 11 Oct 2026
- Integrations
- G3M integrates with GameBanana and can launch supported games through Steam where available; Linux users can use PortProton for compatible Windows games.github.com · read 12 Oct 2026
- License
- The application is distributed under GPL-3.0.g3m.gitbook.io · read 12 Oct 2026
- Mod discovery
- The app browses supported GameBanana games and can install mods from GameBanana, external URLs, local archives, or one-click install links.github.com · read 12 Oct 2026
- Mod editing
- The Mod Editor combines patches, file replacements, and archive contents, and supports exporting mods to share.github.com · read 12 Oct 2026
- Mod profiles
- Yesraw.githubusercontent.com · read 20 Sep 2026
- Mod source access
- built-inraw.githubusercontent.com · read 20 Sep 2026
- Mod tools
- G3M can create and apply patches, merge patch sets, compare files, export diff reports, and convert mods between supported formats.github.com · read 11 Oct 2026
- Patching tools
- Built-in tools create and apply patches, merge patch sets, compare files, and export diff reports.github.com · read 12 Oct 2026
- Plugins
- The Catalog offers plugins including DR Save Manager for DELTARUNE saves and Custom Saves Folders for selecting save locations.github.com · read 12 Oct 2026
- Profiles
- Users can create multiple library profiles with separate active mod selections and profile-scoped settings.github.com · read 12 Oct 2026
- Purpose
- G3M is a desktop manager for GameMaker mods that can browse, install, organize, and launch supported games with mods.github.com · read 11 Oct 2026