Play DOOM's first episode inside Minecraft with cuboid monsters, Minecraft-style weapons and augments. Install the JAR and open a singleplayer world; MOOM automatically prepares the maps on first launch.
Three expressive companions with distinct personalities join your world, react to gifts, help with farming and gathering, and fight nearby monsters together.
The Herobrine you remember is back and stronger: a phase-less weapon master who reads the battlefield and fights with any weapon, anime sword arts and real martial arts.