Minecraft 1.2.7 Alpha Patched Official

Nostalgia Trip: The Mystery and Magic of Minecraft Alpha 1.2.x

Playing 1.2.7 meant accepting these as "features":

Before 1.2.7, running a dedicated Minecraft server for more than four hours was an exercise in masochism. The server heap would fill with orphaned chunk data and disconnected player entities. RAM usage would climb until the Java Virtual Machine crashed with an OutOfMemoryError . Servers were rebooting every 90 minutes. minecraft 1.2.7 alpha

Summary

it is not an official version released by Mojang, but rather a popular, fan-made creepypasta/horror version of the game Nostalgia Trip: The Mystery and Magic of Minecraft Alpha 1