SDK User Guide

	Create maps, uniforms, and flags with the Holdfast SDK. Integrated with Steam Workshop so your work is easy to share. Start with the docs and videos below.

On this page

• Overview
• Documentation
• Video Guides
• Support

Holdfast SDK Guides

Equipping the community with the ability to design, create, and bring to life their own maps, uniforms, and flags in-game. The Holdfast SDK is fully integrated with Steam Workshop, making your creations easy to share.

Overview

Refer to the Documentation or Video Guides below to get started.

Documentation

Covering 100+ pages of guidance—from first steps and best practices to the level editor, Steam Workshop uploads, optimisation, and more.

View the SDK Documentation

Video Guides

A collection by Stan that simplifies the SDK workflow:

• Holdfast: SDK Tutorial #1 – Getting Started
• Holdfast: SDK Tutorial #2 – Creating A New Mod
• Holdfast: SDK Tutorial #3 – Map Scene Hierarchy
• Holdfast: SDK Tutorial #4 – Editing The Terrain
• Holdfast: SDK Tutorial #5 – Placing Objects
• Holdfast: SDK Tutorial #6 – Setting Up Gamemodes
• Holdfast: SDK Tutorial #7 – Play Testing Your Map
• Holdfast: SDK Tutorial #8 – Uploading Mods
• Holdfast: SDK Tutorial #9 – Custom Map Images
• Holdfast: SDK Tutorial #10 – Map Script Settings
• Holdfast: SDK Tutorial #11 – Client Clutter
• Holdfast: SDK Tutorial #12 – Using Particles
• Holdfast: SDK Tutorial #13 – Custom Assets
• Holdfast: SDK Tutorial #14 – Object Destruction
• Holdfast: SDK Tutorial #15 – Custom Ladders
• Holdfast: SDK Tutorial #16 – Custom LODs
• Holdfast: SDK Tutorial #17 – Custom Tools
• Holdfast: SDK Tutorial #18 – Terrain Texture Replacer
• Holdfast: SDK Tutorial #19 – Out Of Bounds
• Holdfast: SDK Tutorial #20 – Scene Camera Views
• Holdfast: SDK Tutorial #21 – Nature Preset Objects
• Holdfast: SDK Tutorial #22 – Faction Objects

Uniform editing (Apex):

• Holdfast SDK Tool Tutorial #1 – Uniform Guide

Support

Got a question that’s not covered above? We’re happy to help, and the community is too.

Join the Official Discord, then apply for the Artisan role by selecting the art emoji in the #getting-started channel. This unlocks all modding and scripting channels.

Discord – Holdfast Workshop

Tools

• Edit body (VE)
• Edit body (source)
• Body history
• Last body edit: Xarkanoth — 2025-09-20 18:11 \1758391871\UTC\C
• —
• Edit wrapper (VE)
• Edit wrapper (source)
• Wrapper history
• What links here
• Changes to linked pages
• Purge cache