SteamFlow

A custom, lightweight Steam launcher and client written in Rust.

SteamFlow is the modern successor to the OpenSteamClient project, leveraging Rust for performance, safety, and a better developer experience. It uses steam-vent for Steam network communication and egui for the user interface.

Current development status

SteamFlow is currently in alpha. We are actively working on reaching feature parity with the legacy C# version and beyond.

SteamFlow Roadmap

• Authentication
  • Login with password
  • Steam Guard (Email/Device codes)
  • Steam Guard Mobile App confirmation
  • Session restoration (Refresh tokens)
• Library
  • Fetch owned games from Steam
  • Scan local installed games
  • Display game covers (automated caching)
  • Basic game launching
• Installation & Updates
  • Download pipeline
  • Update management
  • Uninstall support
• Features
  • Search bar
  • Collections / Categorization
  • Friends list & Chat
  • Steam Cloud integration
  • Workshop management
  • Proton/Wine integration improvements
  • Depot browser (Download specific builds/files)

Getting Started

Prerequisites (Linux)

Ensure you have the following system dependencies installed (Ubuntu 24.04 example):

sudo apt-get install build-essential pkg-config libssl-dev libx11-dev libxi-dev libxrandr-dev libxinerama-dev libxcursor-dev libxkbcommon-dev libasound2-dev libudev-dev libwayland-dev libgtk-3-dev libpulse-dev libdbus-1-dev libegl1-mesa-dev libgles2-mesa-dev

Build and Run

git clone https://github.com/OpenSteamClient/OpenSteamClient.git --recursive
cd OpenSteamClient
cargo run --release

Features & Goals

• No Web Technology: Unlike the official Steam client, SteamFlow does not use CEF or WebViews for its core interface, making it extremely lightweight.
• Fast and Responsive: Built with Rust and egui for a native, snappy experience.
• Privacy Focused: Open-source implementation of Steam protocols.
• Linux First: Great support for Linux, including 64-bit clean architecture and better Proton management.

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Legacy: OpenSteamClient (C#)

The original C# implementation of OpenSteamClient is still available in the root directory but is no longer the primary focus of development.

Contributing

See CONTRIBUTING.md for guidelines.

Credits

• steam-vent - Steam protocol implementation
• egui - Immediate mode GUI library
• open-steamworks - Research resources
• Logo and sound assets by nPHYN1T3

Q&A

Is this a full replacement for Steam?

SteamFlow aims to provide a lightweight alternative for launching games and managing your library. Some features like VAC-secured games or ISteamHTMLSurface (Source engine MOTDs) may never be supported due to proprietary limitations.

Is it safe to use?

SteamFlow uses official Steam protocols. However, it is a 3rd-party client and is not endorsed by Valve. Use at your own risk.