It's important to note that the instructions are far from simple, however, and besides being written in Russian they detail how you're required to get into the recovery (FEL) mode), do some funny stuff with the kernel, and then some even sketchier stuff with custom ROMs. Luckily
some English video tutorials have been made which at least help neutralize the language barrier. It's unclear if the process may damage your device and there is no guarantee that any specific game you would try to load onto your NES Classic Edition will eventually work.
Over on Reddit the people behind the /r/nesclassicmods subreddit have
done a malware scan on the various tools required for the hack and have found some issues which they believe are false positives. Some redditors like /u/zenmechanic
have gone forward with the hack and managed to install a number of different games including
TMNT 2,
Tetris,
Tiny Toons, and... if you were wondering...
Battletoads.
Further reading can be had
here and
here, with the hackers responsible for this exploit participating in both threads if you might have any questions.
