ERROR 422 (demoeater)

this game is mincrafts darker version. It was originally a mincraft snapshot version ("1.3.4") . The games code was completely re-written .But something went wrong at the games lunch, the A-I begun to learn on its own and mojang had to shut down the game immediately, But the internet had all ready has copied the game files and I had manage to find some of the copied files, download the game below AND MAKE SURE TO DOWNLOAD THESE ON YOUR SYSTEM. HERE IS THE FILES: https://www.java.com/en/download/...