Unity is the world’s most popular real-time 3D development platform, powering everything from indie mobile games to blockbuster titles like Genshin Impact and Hollow Knight. However, the default installation process loads files across multiple system directories (Program Files, AppData, and the Registry). For developers who work on multiple machines, lack admin rights, or want to keep a clean, isolated workspace, the concept of a Unity Portable Install is a game-changer.
But can Unity truly be "portable"? The short answer is yes—with caveats. This 2,500+ word guide will walk you through everything you need to know: what a portable Unity install actually means, how to set it up step-by-step, the limitations, and the best tools to manage it.
There are two primary methods to achieve this. The first is the manual way (best for power users), and the second is the "Unity Hub" way (easiest but slightly less portable). unity portable install
Pro tip: Keep a
readme.txton the drive root with the command to run (mklink /J "%LocalAppData%\UnityHub" "D:\UnityPortable\Hub\AppData") so you don't forget it.
Do not click the "Unity Hub" button. Instead, look for the dropdown or alternative downloads. Unity is the world’s most popular real-time 3D
Since you can't set system-wide environment variables without admin rights, you'll use a launch script. Create a file LaunchUnityHub.bat at the root of your portable drive:
@echo off set UNITY_CACHE_DIR=D:\PortableUnity\Cache set UNITY_TEMP_DIR=D:\PortableUnity\Temp set UNITY_EDITOR_LOG_DIR=D:\PortableUnity\Logs set LOCALAPPDATA=D:\PortableUnity\LocalAppData
start "" "D:\PortableUnity\Hub\Unity Hub.exe"There are two primary methods to achieve this
Double-click this batch file every time you want to run Unity. It redirects all Unity temp and cache files to your portable drive.
scoop install unity-hub scoop install unity-2022-lts
Scoop keeps everything inside D:\Scoop\apps with no registry writes.