Flashpoint is a software that allows for the download and playing of a massive amount of Flash games and the like. Its archive includes a copy of motherload which can be easily played offline. It also includes the older miniclip verison of the game.

Note: The infinity version downloads the core program and will only download games you pick out of its archive. The ultimate version comes with all the games already built in, but is massive. I would recommend using the infinity version as it is much smaller and quicker to install.