Extremo es un modo de juego de Minecraft variante del modo de Supervivencia, el cual difiere principalmente por la falta de capacidad de reaparecer (por el contrario, el mundo es borrado). Este modo se introdujo en la versión Beta 1.9 Pre-Release 2 y oficialmente añadido en Minecraft 1.0. La idea la introodujo Notch desde un blog sobre modo de juego de Minecraft en el sitio PC Gamer.[1]
Cuando se juega al modo extremo, la dificultad es ajustada en "Extremo", la cual solo difiere de la dificultad "Difícil" en el hecho de que no puede ser cambiada a otra mientras se juega al mundo.[2]
Un botón del modo extremo posteado en Twitter por Notch[3]
Cuando el jugador muere, la pantalla de "game over" solo ofrece un botón para borrar el mundo en lugar de los botones Respawn y Title menu del modo supervivencia. El mundo guardado sigue existiendo hasta el que el botón es apretado, dejando la oportunidad de que otro jugador continúe jugando. Si el mismo jugador sale y vuelve a entrar despues de morir, la pantalla de "game over" vuelve a aparecer.
As of 12w18a, Hardcore Mode has been made as a difficulty for multiplayer, and dying while in the server does not give you a respawn button. Instead, it tells you to "Leave Server", and when you do it, you get the message "You have died. Game over." If you try to reconnect to the server, it says "You are banned from this server!".
Trivia
While playing hardcore mode, the heart icons of the life gauge are different, as they show two small blood vessels (or eyes).
In the world selection screen, Hardcore mode is written in red.
When a world in hardcore mode is created with the Beta 1.9 pre-release, then played with the Beta 1.8 version, the world is permanently converted into a standard survival world.
When Notch announced Hardcore mode in Twitter, he also posted an image of an "Ultra Hardcore" mode where the premium status of the player's user account is revoked on death. This turned out to be a joke.
It is actually possible to respawn in hardcore mode, via defeating the Ender Dragon and activating the credits, after which you will promptly respawn, without world deletion or death.
Many Minecraft enthusiasts played Hardcore mode before the official version was released. It was simply on the honor system to delete your world if you died. This was often called an "Ironman" game.
Via hacking, it is possible to play a cross between Hardcore and Creative mode. The player can fly and place infinite blocks like in Creative mode, but the world will be deleted upon death. This is because there are separate variables determining if Creative or Hardcore is on.
It is possible to retrieve your world if you die during hardcore mode as long as you have not hit the "Delete World" button. You can do this by going in to your "Saves" folder in Minecraft by going to Library>App Support on Mac, %appdata% on Windows or ~/.minecraft on Linux.
Bugs
In 1.9 prerelease 2, the "World Is Deleted Upon Death" was present regardless of whether the game was hardcore or not. This was fixed in 1.9 prerelease 4.
The "Leave Server" button you get when you die in HMP says "deathScreen.LeaveServer".