Minecraft 1.7.7 was a minor update released by Mojang in April 2014. Its primary purpose was to fix critical server-side issues and crashes related to the introduction of the new skin system and the transition to UUIDs (Universally Unique Identifiers) for player accounts.

between version 1.7.7 and the modern Launcher, or are you looking for more Minecraft urban legends

For the advanced user wanting to recreate this legacy experience:

Minecraft -MULTI--PC--VERSION 1.7.7--P2P-: The Ultimate Multiplayer Nostalgia Guide