Forest Of The Blue Skin -build December- -zell23- //top\\

Exploring the Depths of “Forest of the Blue Skin -Build December- -Zell23-”: A Fan Game Horror Masterpiece

In the sprawling universe of independent horror games, few titles manage to capture the raw, unnerving atmosphere of their inspirations while carving out a unique identity. One such game that has recently surfaced in niche horror communities is Forest of the Blue Skin -Build December- -Zell23-. For fans of Japanese psychological horror, RPG Maker gems, and the iconic Ao Oni (Blue Demon) series, this name has become a whispered legend.

But what exactly is this build? Why is the December release by the creator “Zell23” generating such a buzz? This article dives deep into the gameplay, lore, and technical nuances of this specific version.

Technical Requirements and Installation

Because this is an RPG Maker VX Ace game, it runs on virtually any PC. However, the December build requires the RTP (Run Time Package) for VX Ace. Without it, you will see missing audio files and broken sprites.

Installation steps:

Download the ZIP file labeled ForestBlueSkin_Dec_Zell23.zip.
Extract to a folder (do not run from within the ZIP).
Install the VX Ace RTP from the official RPG Maker web.
Run Game.exe as administrator (to allow save file writing).

Warning: Some antivirus software flags the December build’s custom .dll files as false positives. Zell23 provides a checksum in the readme to verify integrity.

3. Level Design & Atmosphere

The game adopts a dark, slightly melancholic atmosphere. The forest feels genuinely mysterious.

Exploration: The map is interconnected. You start in a forest but eventually find your way into caves, underwater areas, and castles. The exploration loop is rewarding; finding a secret room or a hidden character feels like a genuine achievement.
The "Roguelike" Elements: The December build balances the difficulty well. You lose progress if you die, but the game is generous enough with checkpoints that it doesn't become frustrating. The "Game Over" scenes are the punishment/reward system, encouraging you to play better to avoid them (or see them, depending on your playstyle).

1. Basic File Information

Full title: Forest of the Blue Skin -Build December-
Author: Zell23
Game: Doom II (compatible with limit-removing or Boom source ports)
Map format: Possibly Boom or MBF
Build date: December (year unspecified — likely around 2020–2023 based on author's active period)

Call to action (CTA)

Explore now and post your screenshots—tag me (Zell23) and use #ForestOfTheBlueSkin for a chance to be featured.

If you want this tailored for a specific platform (Twitter/X, Instagram caption, Reddit post, or Discord announcement), tell me which and I’ll format it accordingly.

Forest of the Blue Skin (also known as Blueskin No Mori) is a pixel-art eroge and monster girl-themed survival game developed by the Japanese creator Zell23. 🎮 Game Overview

The game follows an unnamed young man who traverses a vast world filled with "monster women."

Core Loop: You explore different biomes, capturing or outwitting monster girls while managing your survival.

Mechanics: It features Metroidvania elements, including secret walls, puzzles, and "dummy rooms" designed to trap the player.

Progression: Players obtain power-ups and special abilities (like the "Self-Pleasure" skill) to reach new areas and defeat bosses. 🌲 Major Environments

The game world is split into several distinct zones, each with unique enemies: Forest of the Blue Skin -Build December- -Zell23-

Savannah & Forest: Early-game areas where the protagonist learns basic skills.

Underground Laboratory & Ancient Tombs: Feature more complex puzzles and relic items.

Dream/Nightmare Mansion: A late-game dark maze filled with tricksters like the Puppeteer and Black Rabbit.

Golden Lands: A glittering forest area where the name "Bruce's Gold Forest" likely originated. 📅 Build Versions (Zell23 Updates)

Zell23 frequently updates the game via platforms like Pixiv Fanbox and Patreon.

December Build: Recent updates typically include "Reuploads" and new animation scenes. For example, a November update added a new exclusive video and scene.

Current Status: The project has historically been split into A-version (v1.20) and B-version (v1.05) to accommodate the large amount of content and engine limitations.

Remake: Zell23 is also working on a remake, with gameplay and development news shared via Zell23's Twitter.

⚠️ Content Advisory: This game is intended for adult audiences and contains explicit pixel-art animations.

forest of the blue skin remake gameplay download twitter @zell2323 (zell23[ぶるーすきん工場]) game available on the zell23 pixiv fanbox YouTube·FoxWaifu

Forest of the Blue Skin (colloquially known as FoBS) is a pixel-art survival-exploration game developed by Zell23. It is often categorized as a "Monster Girl" eroge/hentai game where players navigate a vast world filled with puzzles, traps, and boss battles.

If you are looking for information on the December build or a helpful guide to getting through the game, Core Gameplay Mechanics

Exploration & Survival: The game features a Metroidvania-style world with hidden areas, trick walls, and "dummy rooms" designed to trap the player. Exploring the Depths of “Forest of the Blue

Monster Interactions: The primary goal is to interact with and outwit various monster girls to obtain power-ups and progress further.

Boss Battles: These are major difficulty spikes requiring specific strategies. For example:

The Shadow Demon: Requires finding her spawn location quickly as her attacks speed up over time.

The Yeti: Requires using a specific "Kappa dash" ability to dodge before counter-attacking.

The Puppeteer: Involves defeating multiple puppets (Bear, Bunny, and Fox) to draw the boss out for an attack. Key Locations and Encounters

Golden Lands: Features encounters like the Minotaur, Owls, and Ms. Reptillian.

Volcano: Home to the Hot Golem, Flame Centaur, and Salamander.

Horror House: Includes the Nightmare, Ghoul, and Poltergeist enemies. Recent Updates (December Build)

While the game has been in development since roughly 2015, creators like Zell23 periodically release updated builds with new content. As of late 2025/early 2026, the game has reached high completion levels, with creators often sharing updated scene packs or "complete reuploads" via platforms like Patreon.

For a detailed walkthrough or boss guide, community-made video playlists such as those from Free Games Zidane are frequently used by players to navigate the trickier platforming sections. Fobs/Forest of The Blue Skin Face B: All catch guide

The story of Forest of the Blue Skin (or Blueskin No Mori), developed by Zell23, follows an adventurous young man who ventures into a vast, deceptive world filled with secrets and dangerous "monster women". The Journey Begins

Starting with a sense of overconfidence, the protagonist explores the Savannah and the Forest. The world is designed to trap the unwary, featuring:

Deceptive Environments: Trick walls, hidden areas, and "no-win" rooms that require wit to escape. Download the ZIP file labeled ForestBlueSkin_Dec_Zell23

Encounters and Growth: The protagonist must capture or outwit monster girls to obtain power-ups and learn new skills.

Boss Battles: He eventually faces powerful threats, such as a Minotaur, Ms. Reptillian, and a Flame Centaur, using strategy to overcome their patterns. The Dream Mansion

After retrieving a "Dark Key" from the Great Tree, the young man returns home only to fall into a deep slumber. He awakens in an oppressive Dream Mansion (or Nightmare Mansion), which serves as a warped version of reality.

Trial of the Mansion: To progress, he must navigate unique puzzles, such as the Mummy Mausoleum and the Gargoyle Chamber, which involve specific interactions to pass.

The Awakening: His journey through this dark manor culminates in a battle with a crazed game show Bunny Girl, whose encounter abruptly wakes him from his sleep. Epilogue

Content with his strange adventures, the protagonist eventually moves on to explore foreign lands, with his next journey beginning at a mysterious haunted house. Recent updates from Zell23 continue to expand this world with new scenes and remade gameplay elements. Fobs/Forest of The Blue Skin Face B: All catch guide

Forest of the Blue Skin (FOBS) - Build December Review

Verdict: A Cult Classic of Intimate Action-Platforming

Forest of the Blue Skin by Zell23 is one of those titles that defines a specific niche. If you have played it, you know exactly what kind of game it is. The "Build December" version is widely considered one of the more stable and content-rich iterations of the game before later updates shifted mechanics or introduced new bugs.

Here is a solid review breakdown of the game.

Why This Build Stands Out in the Horror Genre

In an era of hyper-realistic 3D horror games (think Resident Evil Village or The Callisto Protocol), Forest of the Blue Skin -Build December- -Zell23- proves that limitation breeds creativity. The fixed camera angles and tile-based movement create a tension that modern over-the-shoulder games often miss. You cannot see what is two steps ahead of you.

The December build’s audio overhaul deserves special mention. Zell23 recorded actual forest ambiance at midnight, then reversed and pitch-shifted the audio. The result is a soundscape where bird calls sound like human cries and wind sounds like weeping.

Final Verdict

Forest of the Blue Skin -Build December- -Zell23- is not for the faint of heart. It is a love letter to classic Japanese horror games that prioritizes dread over gore and puzzle-solving over action. The December build represents the peak of Zell23’s vision – polished, terrifying, and deeply mysterious.

If you are a fan of Ao Oni, Mad Father, or The Witch’s House, this is your next obsession. Just remember Zell23’s own warning in the build notes: “Play at night. Headphones on. Lights off. And do not save inside the Shrine.”

Have you played the December build of Forest of the Blue Skin? Share your experience in the horror gaming forums. And keep an eye on Zell23’s feed – whispers of a “Spring Remaster” are already surfacing.