| Issue | Solution | | :--- | :--- | | | You are using a modern JRE. Switch the portable pack to use Java 8 or lower via the batch file. | | Screen is completely black (sound works) | LWJGL version mismatch. Replace the lwjgl.dll and lwjgl.jar in the portable folder with Alpha-compatible versions (LWJGL 2.4.2). | | Game crashes when creating a world | The options.txt file has a resolution too high. Edit it manually to set width:800 and height:600 . | | Multiplayer "Connection refused" | You cannot connect to modern servers. You must host a LAN server using the minecraft_server.jar from the Alpha 1.0.3_02 archive. |
or standalone folder for the specific ARG, place it on a USB drive, and run it. It usually does not require a standard installation into the official launcher. Accessing Official Historical Alpha Versions minecraft alpha 103 02 portable