Definitive Herobrine

Herobrine – passive (they watch)

• Watcher – Stands far away and stares. Look at him and he turns, runs out of sight and is gone.
• Stalker – Follows you at a distance and vanishes shortly after you notice him.
• Lurker – Hides at the edge of your view. You catch a glimpse out of the corner of your eye and he is gone.
• Doorway – Stands in a doorway of your own house. (Reference to BroCraft first sighting)
• Lava Overseer – Floats above lava pools, watching. (Reference to the fake lost Patimuss stream)
• Miner – Appears at the end of your strip mine and vanishes. 
• Sleep Watcher – Watches you while you sleep.

Herobrine – aggressive

• Ambush – Waits for you, then attacks.
• Chaser – Runs you down.
• Hunter – A killable Herobrine that hunts you with a diamond sword.
• Miner-Chaser – Breaks into your strip mine and chases you down the tunnel. Cannot be harmed; a redstone torch drives him off. (A reference to the classic minecraft Space Waffle sighting)
• Miner-Ghost – Hears your footsteps underground and digs towards you, up and down, through the stone. (Really Freaky Honestly)
• Herobrine Enderman – A white-eyed enderman with 60 hearts. Moves only when you are not looking, teleporting closer each time; freezes and stares when you look. (Easy to kill if you keep your eyes on him.)
• Nightmare Herobrine – Hunts you through the maze when you have a nightmare.

The White Eyes ("Her")

• The White Eyes – A spider-legged creature with two white eyes in the dark. Seeing it makes you nauseous, then it is gone.
• Whisper – An unseen variant that whispers behind you in caves.
• Hanger – Hangs upside down from cave ceilings, and very rarely from the roof of your own house.

Null family

• Null Stalker – A black figure deep underground, away from your torches. Flees when found.
• Null Darkness Bringer – Puts out your torches, then attacks in the dark.
• Null Lurker – A Lurker in Null's skin; rarely falshes his white eyes.
• True Null – Rises with tendrils and applies the NULL effect: black, glitching hearts and constant damage until you die, place a Null Stopper, or put down lava.

Error 422 family

• Error 422 Lurker – Very rare. Seeing him glitches your hearts and hunger bar and plays faint static.
• Error 422 – Extremely rare. Your whole screen corrupts, static fills your ears, you are pulled towards him and killed instantly. The death message has no name.

Entity 303 family

• Entity 303 Lurker – A white hooded Lurker. Very rarely leaves a sign reading "hjälp".
• Entity 303 Griefer – Appears and sets a forest on fire, lights your house with flint and steel, primes TNT beside you, or calls lightning on you.
• Entity 303 – Flies in from far away with 200 hearts. If he sees you he throws ghast fireballs and lightning. Hide out of his sight, or fight back with the Admin Gem.

Biomes

• Foggy Forest – An alpha-style forest in thick fog, with old textures, flat colours and leafless trees. White-eyed animals and the passive Herobrines are far more common here.
• Floating Cactus – A desert where the sky is full of floating cactus. The only place that raises Error 422 family spawn rates, and the only home of headless animals and glitchy monsters.
• Nightmare – A dark maze dimension you can wake up in when you sleep.

Structures

• Leafless trees – The most common sign that he has been here.
• Sand pyramids – Small pyramids where there were none.
• 2x2 tunnels – Long, perfectly straight tunnels through the stone.
• Redstone torch tunnels – Rare lit tunnels.
• Crosses and glowstone letters – Very rare.
• Signs and traces – Signs with messages, short tunnels and stripped leaves left behind.
• Glitch blocks – Extremely rare. A natural block near you is replaced by flickering static.

Shrines

• Herobrine shrine – Build and light it to summon him. It angers him: more spawns, worse karma.
• Second shrine – A mossy cobblestone cross with a diamond block, netherrack fire and redstone torches. Drop an offering:
  • Diamond – His Blessing: buffs and fewer hostile spawns.
  • Netherite ingot – His Greater Blessing: stronger buffs, +5 hearts and one calm day.
  • Gold ingot – He takes it, insults you and gives nothing.
  • Egg – He is not impressed.

Karma

One score from -100 to +100 decides how much attention you get.

• Raises it: gifts at the second shrine, breeding animals.
• Lowers it: killing farm animals, lighting the Original Herobrine shrine.
• Good karma: fewer nightmares, a longer peaceful start, fewer white-eyed animals.
• Bad karma: more nightmares, they come for you sooner, more white-eyed animals, hostile white-eyed dolphins.

Mechanics

• Peaceful stretch – Nothing stalks you for the first 5 in-game days (1–24, your choice). Bad karma ends it early.
• Nightmares – Sleeping can drop you into the Nightmare maze. Reach the end, or be caught, to wake up.
• Chat messages – Herobrine occasionally speaks in chat.
• Give Them control – Hand the settings over. Spawn rates and your karma are set at random, and shrines stop working. You were warned.

Gems

Craft a gem with any sword to socket it; craft the sword alone to remove it.

• Admin Gem – Right-click to strike Entity 303 with lightning; the only way to hurt him. The sword does nothing to anything else. 4 diamond blocks, 2 gold blocks, 2 netherite ingots, 1 nether star.
• Null Stopper Gem – One hit ends True Null and cures the NULL effect. 6 deepslate, 2 diamond blocks, 1 golden apple.
• Code Fixer Gem – One hit removes Error 422. 8 concrete (any colours), 1 diamond.

Settings

• Pop-up menu (key H) – Spawn-rate preset (Rare, Normal, Frequent, Nightmare, Hell…), peaceful days, and Give Them control.
• Commands – /herobrine shows everything.