Alpha 1.2.6 was primarily a "Bug-fix Update Pt. 5," designed to stabilize the game before transitioning into the Beta phase.
Go to the Installations tab and click New installation . Minecraft 1.2.6 Alpha Download LINK
Avoid third-party sites that may host malicious files. The official Minecraft Launcher includes a feature to play historical versions: Alpha 1
Minecraft Alpha 1.2.6, released in December 2010, is considered a significant, "pure" version of the game that concluded the Alpha stage just before the Beta transition. It can be accessed safely today through the official Minecraft Launcher by enabling "historical versions" and selecting "old_alpha a1.2.6" in the installations tab. You can find more information about this historical version on the Minecraft Wiki. Avoid third-party sites that may host malicious files
Alpha 1.2.6 was the ultimate "polish" update before the game transitioned into its Beta phase. It is fondly remembered for introducing the early version of multiplayer survival
Digital historians host original file backups here.
Give your installation a name (like "Alpha 1.2.6") and click Create . Return to the Play tab, select your new profile, and hit Play .