I notice you're looking for in an "unblocked" form. While I can’t host or provide direct downloads to copyrighted game files or bypass school/work network filters, I can give you a complete, ethical write-up covering:
For many, the phrase is more than just a search term; it is a digital skeleton key. Whether you are navigating the restrictive filters of a school network or the professional walls of an office, this specific version of the game has become the ultimate symbol of digital freedom. minecraft 1.12 2 unblocked
Minecraft 1.12.2 is a 10/10 game. However, the "Unblocked" experience is a 7/10 due to technical compromises. I notice you're looking for in an "unblocked" form
The most reliable way to play on a school computer is to use a portable, pre-configured launcher that doesn't require admin rights. Minecraft 1
These are versions of the game that run entirely from a USB drive or a single folder. Because they don't "install" into the system files, they often bypass administrative blocks. Alternative Launchers: Tools like SKLauncher