It sounds like you're looking for information or a guide regarding — likely referring to an older version of Minecraft (specifically, Java Edition 1.5.2 , also known as the "Redstone Update") that can be played in environments where the game is normally restricted (e.g., school or work networks).
If you need technical steps for running 1.5.2 offline legitimately , let me know and I can provide a clean guide. 1.5 2 minecraft unblocked