You can make the official launcher behave "portably" by using a simple command-line argument. Create a folder on your USB or desired location (e.g., MC_Portable Minecraft.exe into this folder. Create a shortcut for the , right-click it, go to Properties , and in the field, add --workDir . at the very end.
Most of these clients offer a "Portable" or "USB" mode in their settings. minecraft download 189 portable
: Developers host projects like clement-songis/minecraft-portable that provide minimized files for various versions, though these often require more technical setup. You can make the official launcher behave "portably"