Advanced Guide

Community-Supported Guide

This guide is community-maintained and not an official OpenSteamTool resource.

Welcome to the advanced section of the OST documentation. This section covers developer-focused topics, technical details, and configuration reference.

Getting Started

If you're new to OpenSteamTool, start with the User Guide for installation instructions.

Download Options

Pre-built binaries are available from the GitHub releases page.

Release Build

The Release build is optimized for everyday use. It is fully functional and does not write detailed logs. Recommended for most users.

File	Description
`OpenSteamTool-x.x.x-Release.zip`	Release build (recommended for daily use)

Debug Build

The Debug build writes detailed per-module log files to <Steam>/opensteamtool/. Useful for troubleshooting issues or understanding what OST is doing under the hood.

File	Description
`OpenSteamTool-x.x.x-Debug.zip`	Debug build with full logging

Verifying Downloads

Each release ZIP includes a SHA-256 checksum. Verify the integrity of your download:

powershell

Get-FileHash OpenSteamTool-x.x.x-Release.zip -Algorithm SHA256

Compare the output with the checksum provided on the releases page.

Building from Source

If you want to modify the code or develop features, see the full Building from Source guide. You'll need:

Windows 10/11
Visual Studio 2022 with MSVC (x64 toolchain)
CMake 3.20+

powershell

git clone https://github.com/OpenSteam001/OpenSteamTool.git
cd OpenSteamTool
build.bat

What's in This Section

Page	Description
Building from Source	Full build instructions, project structure, development workflow
Lua Scripting API	Complete Lua API reference for game configuration
Configuration (TOML)	`opensteamtool.toml` reference — manifest APIs, injection, logging
Core Features	Game unlocking, hot reload, Denuvo compatibility, DLL injection, stats
Denuvo & Tickets	Ticket management, Denuvo authorization, SteamStub bypass
Online Fix	Enabling multiplayer with `-onlinefix`
DLL Injection	Game-process library injection configuration
Steam Compatibility	Pattern system, version compatibility, remote mirrors
Debug Logging	Log file reference and troubleshooting
Depot Keys & Steam Downloads	Technical deep-dive into Steam's download/preload system and depot decryption
Upcoming Features	In-development Lua functions and features

Advanced Guide ​

Getting Started ​

Download Options ​

Release Build ​

Debug Build ​

Verifying Downloads ​

Building from Source ​

What's in This Section ​