In Steam, launch commands and environment variables allow you to adjust how Proton initializes games. They are added under Game Properties > General > Launch Options . The Core Rule: How Syntax Works Every environment variable or wrapper script must be placed before %command% , which acts as a placeholder for the game's actual executable. Bash VARIABLE_NAME=value %command%
To use multiple variables at once, simply chain them together with spaces before %command% :
Bash
SteamDeck=0 PROTON_LOG=1 MANGOHUD=1 %command%
Top Environment Variables & Use Cases
1. Bypass "Steam Deck" Locks & Forced Settings
Command: SteamDeck=0 %command%
What it does: Tricks the game into thinking it is running on a standard PC desktop rather than a Steam Deck.
Why use it: Some games automatically lock graphics settings, limit resolution options, or force low-texture presets when they detect a Steam Deck. ...
The most complete and highest-performing web browsers in 2026 are Google Chrome, Microsoft Edge, Mozilla Firefox, Apple Safari, Brave, and Opera . Each excels in different areas: Chrome in speed and ecosystem integration, Edge in AI features and Windows synergy, Firefox in privacy and customization, Safari in efficiency on Apple devices, Brave in security and ad-blocking, and Opera in innovation with built-in tools. Top Web Browsers in 2026 Browser Strengths Weaknesses Best For Google Chrome Fast performance, huge extension library, seamless Google integration High memory usage, weaker privacy defaults Users who want speed + Google ecosystem Microsoft Edge Built-in AI assistant, strong Windows integration, excellent performance Limited extensions compared to Chrome Windows users, productivity-focused browsing Mozilla Firefox Open-source, strong privacy tools, customizable Slightly slower than Chrome/Edge Privacy-conscious u...