I like every here and there testing an older version of Minecraft, from the "old alpha" versions to the newest ones. But a while ago I let my older relative play, and after that I found a version labeled "1.8.10" in the profile editor in the launcher. 1.8.10! That doesn't exist! So I decedied to launch Minecraft on the version.
It's similar to the normal 1.8, just has buttons named "Metro" and "donate" in the main menu. That means I'm running the Metro hacked client!
But what I don't understand is why it's named "1.8.10"? Is it possible to rename versions? If yes, how?
P.S. Asking my relative is not a solution, sadly.