SkateGM

Skate 3 in Garry's Mod.

SkateGM runs Skate 3's board physics, tricks and scoring inside Garry's Mod, on any map and with friends. It also comes with minigames, a park editor and a gamemode built for skating.

It doesn't include anything from Skate 3. It reads the game files from your own copy.

What you need

• Garry's Mod on the x86-64 branch. In Steam, right-click Garry's Mod >

  Properties > Betas, and choose x86-64.

• An Xbox-style controller. Skating is controller only.
• Your own copy of Skate 3 for the Xbox 360, dumped by you as a folder

  that holds default.xex. If you have an .iso, extract it first, for example with extract-xiso.

• Windows.

Install

1. Download SkateGM-Setup-.exe from the

   latest release.

2. Close Garry's Mod and run the installer.
3. Choose your Skate 3 default.xex and press Install.

   The installer finds Garry's Mod on its own; if it can't, choose the folder that has garrysmod inside. It converts your game files on your PC (nothing is downloaded) and installs the add-on and the engine module.

To update, run the new installer. Tick "Keep the game data I already converted" to skip converting again. To uninstall, run the installer and press Uninstall.

Play

• The SkateGM gamemode: pick it from Garry's Mod's gamemode list, or

  load an sgm_ map such as the included sgm_warehouse. Everyone skates all the time.

• Any other gamemode: open the console and type bind j skategm_toggle

  once. After that, J switches Skater mode on and off.

The first start takes a little while to load.

Controls

Skate 3's own controls work as in the game. Hold LB to show the extras:

Minigames

Host one with LB + D-pad left; others join from the same menu.

Server owners can turn each one off in Settings > Advanced, or with skategm__allowed 0.

Multiplayer

Everyone who wants to skate runs the installer on their own PC. A dedicated server only needs the skategm add-on folder, from the release zip, in its garrysmod/addons.

Install by hand

If you'd rather not use the installer:

1. Unzip skategm_.zip.
2. Put gmcl_skategm_win64.dll in garrysmod/lua/bin, making the bin

   folder if it isn't there.

3. Put the skategm folder in garrysmod/addons.
4. Convert your game files with Python 3:

    pip install numpy Pillow
    python exporter/convert.py --xex "D:/Games/Skate 3/default.xex" --out C:/skategm

   SkateGM looks for the data in C:/skategm/assets. If you put it somewhere else, type skategm_data "your/folder/assets" in the console.

Building from source

The module is Rust (gm_skategm/, with the engine in engine/), built for Windows with Rust 1.91.1 and MinGW-w64. The engine needs a few nightly features, added by the rustc wrapper in gm_skategm/build/:

cd gm_skategm
rustc -O build/rwrap.rs -o build/rwrap.exe
RUSTC_BOOTSTRAP=1 RUSTC_WRAPPER=$PWD/build/rwrap.exe cargo build --release \
  --features engine --ignore-rust-version --target x86_64-pc-windows-gnu \
  -Zbuild-std=std,panic_unwind --lib

The add-on is plain Lua in addon/skategm/. To extend SkateGM from your own add-on, see minigames, board types and effects and park parts.

A note on AI

SkateGM's code was written with the help of AI coding tools. I don't support using generative AI for creative work like art, music, video, 3D models, writing or game design, and I don't generally support giving AI free rein over a project's structure and scaffolding either.

As a hobbyist indie game developer, I do not use generative AI for any assets, nor for the game logic development, as I consider video games to be pieces of art in every aspect, including the game logic.

Skate 3 itself is the work of the talented people at EA Black Box. This was just a way to play it in multiplayer with my friends, and I thought I might as well release it.

Credits

SkateGM builds on others' open work:

• SK8-ENGINE/skate-3-rust-engine:

  the Skate 3 engine reimplementation SkateGM runs, and the data exporter in exporter/tools/ (commit cb79689).

• 2010 Rust Rewrite Mashup

  by chasmlol (Apache-2.0; a fork of IW4L by vladtrc). The engine in engine/ is its skate/ folder with our changes (engine/README.md), and exporter/convert.py is adapted from it.

• Skate 3 Custom Engine Layer contributors (MIT): the game archive readers

  in exporter/tools/vendor/university and exporter/tools/owned_game.

• duckyinnit (MIT): UTT, in exporter/tools/vendor/utt.
• chasmlol/skate-3-trick-toolkit:

  the animation and skeleton decoders in exporter/tools/vendor/skate3_anim.

Each part's licence is listed in LICENSE-THIRD-PARTY.md.

SkateGM is a fan project, not affiliated with or endorsed by Electronic Arts. No EA code or game data is included.