One of the biggest complaints people have had about the NES Classic (aside from the short wire length of the controllers), has been the finite number of 30 games pre-loaded onto the system. As it stands, Nintendo has no plans to offer software updates to load more games onto the system. That’s it. The NES Classic is a standalone device, which is truly a rarity these days. Once you have had your fill of those 30 pre-loaded games, there really is no incentive to turn the system back on. Of course, it was only a matter of time before someone found a way around that:
What your seeing is a Russian hacker called “Madmonkey” taking advantage of an exploit involving a Super Mario Bros. save file, allowing for a plethora of new games, like Battletoads:
… and Tetris:
There is a tutorial available on Reddit, detailing how to hack your own NES Classic. However, just like any smartphone jailbreak, do so at your own risk.