Green Demon Challenge

A relentless Green Demon spawns halfway through each biome and hunts the closest player.

It doesn’t stop. It doesn’t forget.

And it will ruin you.

Inspired by the Green Demon Challenge, this mod turns every run into a panic-inducing frantic race where teamwork, betrayal, and terrible decisions decide who survives.

😈 What This Mod Does

Halfway through each biome, a Green Demon will spawn behind the group, and begins to chase the closest player.

if it touches you... you're done.

To keep things fair, the demon slows down as it gets closer, and it's a bit slower at going up or down. It will also play a little tune, so you can easily know where it currently is. There is also a visual HUD tracker that tracks the demon on screen.

By default, they also despawn after lighting the next campfire.

🧠 Tips

Like the original Green Demon Challenge, the key is to track where the demon is.

You'll then need to use the mountain itself as your shield. So by moving swiftly behind rocks/obstacles, you can effectively make the demon stuck and climb without any issue.

Another good strategy is to split up. You could potentially confuse the demon, earn some ease of mind and even make it stuck if you're smart about it. You could also decide to sacrifice one of you when it becomes dire.

🔌 Mod Compatibility

This mod is compatible with a couple of other mods. When a compatible mod is detected, additional mechanics will be added to spice up the challenge. These mod includes:

• Lucky Blocks
• Unnamed Products

⚙️ Settings

You can tune the mod to fit your group's needs. This is particularly useful if you want a more casual climb, or add a bit more chaos in +20 lobbies.

Lobby Settings (Host Controlled)

When in a lobby, the host’s settings applies to everyone.

[!NOTE] ⚠️ These cannot be changed after leaving the airport (host included) Any changes mid-run only apply to the next run

Here's the list of lobby settings available:

General Settings

Demon Caught Effect

What happens to players caught by Green Demons. Can be any of:

• RANDOM: Random effect each times. (smart selection)
• KILL (default): Instant death.
• ZOMBIFY : Turn you into a Zombie instantly.
• FULL_INJURY: Gives +100% Injury, giving teammates a chance to save you. (Insta-death for skeletons)
• HALF_INJUSRT: Gives +50% Injury. (Insta-death for skeletons)
• FULL_POISON: Gives +100% Poison, giving teammates a chance to save you and/or wait it out. (skeletons are immune)
• HALF_POISON: Gives +50% Poison. (skeletons are immune)
• FULL_SPORES: Gives +100% Spores, eventually turning you into a Zombie if nothing is done. (skeletons are immune)
• HALF_SPORES: Gives +50% Spores, potentially turning you into Zombie. (skeletons are immune)
• CURSE: Gives +25% Curse.
• EPPY: Gives +100% Drowsy (skeletons are immune)
• NO_STAM: Keeps your base stamina bar empty for 60 seconds
• ASTORNAUT: Makes you reach for the stars!
• FLING: Flings you off the mountain.
• FALL: Makes you fall/play dead for 30 seconds.
• SCOUTMASTER: Calls the Scoutmaster on you for 60 seconds.
• POOR_BOY: Lose your WHOLE inventory, Backpack included.
• DYNA_BRUH: Gives you one lit dynamite.
• SCORPION: Gives you a Scorpion.
• MANDRAKE: Gives you a Mandrake.
• BEES: Spawns Bees on you.
• EXPLODE: Makes you explode.
• SPORE_CLOUD: Spawns a Spore Cloud on you.
• POISON_CLOUD: Spawns a Poison Cloud on you.
• FIRE_CLOUD: Spawns a heat-inducing Fire Cloud on you.
• ICE_CLOUD: Spawns a cold-inducing Ice Cloud on you.
• BIOME_CLOUD: Spawns biome-specifics clouds on you.
  • For SHORE, spawns an ICE_CLOUD if the night are cold and is at night. Otherwise, spawns a POISON_CLOUD
  • For TROPICS, spawns a POISON_CLOUD
  • For ROOTS, spawns a SPORE_CLOUD,
  • For ALPINE, spawns an ICE_CLOUD,
  • For MESA, CALDERA, THE KILN, PEAK, spawns a FIRE_CLOUD.
  • For anything else, spawns a POISON_CLOUD.
• BLINDS: Blinds you for 30 seconds.
• NUMBS: Numbs you for 30 seconds.
• BAD_SHROOMBERRY: Gives you a random bad Shroomberry effect.
• TORNADO: Spawns a strong tornado on you for 12 seconds.
• NO_FLARE: Lose ALL your flare
• COOKED: Cooks your WHOLE inventory.
• SLIP: Makes you slip on a Berrynana Peel .
• W_KEY_STUCK: Forces you to move forward for 60 seconds.
• GO_BACK: Uses your last Checkpoint Flag, or teleports you to the previous campfire (or to the crash site in the SHORE) if none were placed.
• SET_FIRE: Sets you on fire (If Unnamed Products is not active, defaults to FIRE_CLOUD)
• FIREBALL: Explodes a fireball on you (If Unnamed Products is not active, defaults to FIRE_CLOUD)
• SPAWN_LUCKY_BLOCK: Bonks a Lucky Block on your head. (If Lucky Blocks is not active, defaults to RANDOM)
• UNNAMEIFY: Turns ALL your inventory into unnamed variants. ( If Unnamed Products is not active, defaults to RANDOM)

Green Demon Amount

The amount of Green Demons that spawns in at once. (Max: 10)

Green Demon Delay

How long the demon will wait after spawning before starting to chase players.

Green Demon Mode

Sets how Green Demons spawns and despawns. Can be any of:

• NORMAL (default): Despawns when campfire is lit.
• HARD: Pauses at campfire, resumes when it goes out. If there are more green demons than Green Demon Amount, the mod will not spawn demons.
• VERY_HARD : Same as HARD but demons always spawns at each biome.

Type of Green Demon Random Effects

Restricts the type of caught effects that can be chosen with the RANDOM caught effect. Can be any of:

• CASUAL : Removes every hardcore effects from the effects pool, like KILL or POOR_BOY
• STANDARD (default): Keeps every caught effects.
• HARDCORE : Removes every casual effects from the effects pool, like SLIP or BEES

Green Demon Speed

How fast the demon goes. There's 3 speed:

• SLOW
• MEDIUM(default)
• FAST

Biome Lobby Settings

• Enable Shore: Enables/Disables Green Demon spawns for SHORE.
• Enable Tropics: Enables/Disables Green Demon spawns for TROPICS.
• Enable Roots: Enables/Disables Green Demon spawns for ROOTS.
• Enable Alpine: Enables/Disables Green Demon spawns for ALPINE.
• Enable Mesa: Enables/Disables Green Demon spawns for MESA.
• Enable Caldera: Enables/Disables Green Demon spawns for CALDERA.
• Enable The Kiln: Enables/Disables Green Demon spawns for THE KILN.
• Enable Gloom: Enables/Disables Green Demon spawns for GLOOM.
• Enable The Citadel: Enables/Disables Green Demon spawns for THE CITADEL.

Client Settings

Aside from lobby settings, these settings only affect your personal experience:

Green Demon Volume

Adjust the chase music (set to 0 to mute)

Green Demon Tracker Mode

Changes how the HUD Green Demon tracker works:

• ALWAYS: Always visible.
• OFFSCREEN: Only when off-screen.
• NEVER: Disabled.

🐛 Issues

If you find any bugs or have any suggestion, please open an issue on the GitHub repository here.

Include as much info as possible, and we'll respond as soon as we can.

Changelog

[2.0.0] - 2026-08-11

Changed

• The Final Ascent support!

[1.4.1] - 2026-08-10

Changed

• Added a fallback position in case the "The Kiln" bridge isn't found (as a quick possible fix for The Citadel)
• Refactored Lucky Blocks integration

[1.4.0] - 2026-08-08

Changed

• Pre Final Ascent update
• Added a restriction to the FLING effect while at PEAK

[1.3.4] - 2026-07-29

Changed

• Fixed 1.65a+ bugs where the demon wouldn't spawn in some maps

[1.3.3] - 2026-07-24

Added

• Added 1.65a support

[1.3.2] - 2026-05-24

Changed

• Fixed a bug with vanilla audio sliders not working with green demons

[1.3.1] - 2026-05-17

Changed

• Fixed a bug with the volume slider not getting set properly with new green demons

[1.3.0] - 2026-05-06

Àdded

• Added fallback effects when spawining GameObjects in some effects fails.
• Added 3 random effect pool preset to give further control over green demons outcomes:
  • This new lobby setting (named Type of Green Demon Random Effects) only takes effect when using the RANDOM catch effect and can be any of:
    • CASUAL: Removes harsh effects, like KILL or POOR_BOY
    • STANDARD (default): Keeps all caught effects
    • HARDCORE: Removes soft effects, like SLIP or BEES

Changed

• Code cleanup, refactorings.
• Fixed Lucky Blocks support.
• When UnnamedProducts enabled, flairs that were taken away at the shore now respawn at the crash plane using their correct brand.
• Made spawned tornado always target the caught player.
• Moved calera's green demon spawn closer to The Kiln and closer to the lava.
• Added a slight delay when spawning multiple green demons.

[1.2.0] - 2026-05-03

Added

• Added a small flocking behavior to Green Demons when there are more than 1

[1.1.2] - 2026-05-03

Changed

• Fixed soft dependencies (again)
• Fixed a physics bug that can make demons sticks to each other.

[1.1.1] - 2026-05-02

Changed

• Fixed Lucky Blocks compatibility when spawning demons

[1.1.0] - 2026-05-01

Added

• Added support for TimeTheme

Changed

• Slight tracker optimisations
• Fixed soft dependencies

[1.0.3] - 2026-04-29

Changed

• Reducced bundle sizes.
• Added EQs, reberbs to chase loop.

[1.0.2] - 2026-04-25

Removed

• Removed unwanted code

[1.0.1] - 2026-04-25

Added

• Made Green Demons despawn when the credits starts

Changed

• Replaced the demon's PositionSyncer script with a PhysicsSyncer for smoother movement.
• Added a simple raycast to spawn the demon at a correct position
• Spawning balancing
  • CALDERA:
    • Crow flight threshold 50% -> 40%
  • MESA, ALPINE:
    • Crow flight threshold 50% -> 40%
  • THE KILN:
    • Pull demon spawn point up a bit.
    • Climb threshold 50% -> 33%
  • PEAK:
    • Put demon spawing position closer to the peak
    • Climb threshold: 50% -> 15%
• Tweaked demons speeds:
  • THE KILN:
    • Reduced demon altitude speed nerfs -50% -> -5%
    • Reduced lateral speeds by 20%
  • CALDERA:
    • Removed altitude speed nerfs

[1.0.0] - 2026-04-24

• Initial Release