Minecraft Alpha 1.2.6, released on December 3, 2010, served as the final bug-fix update of the Alpha phase before transitioning to Beta. The update introduced surface lakes, lava pools, and the /kill command, while patching critical exploits like boat duplication. For more details, visit Minecraft Wiki . Java Edition Alpha v1.2.6 - Minecraft Wiki
Alpha 1.2.6 is considered the last "pure survival" version before Beta introduced mechanics that are still present today (sprinting, hunger, XP). Many classic Let's Plays (e.g., early Coe's Quest, SeaNanners) used this version or 1.2.5. minecraft 1.2.6 alpha