Unlike Steam games that require a client, Laxius Force 3 (often purchased from Aldorlea or RPGMaker sites) can be run as a standalone executable.

Laxius Force III: The Last Stand is the final installment of the Laxius Force trilogy by Aldorlea Games

Before diving into the walkthrough, let's ensure your game is genuinely portable. The keyword here is —meaning no installation on the host PC, save files syncable or stored locally on your USB/SD card.