Underworld Office: Story game (macOS)

Last Updated: Jul 8, 2026 Developer：Buff Studio Co.,Ltd.

Play Underworld Office: Story game on PC and Mac

Underworld Office: Story Game is an interactive visual novel developed by Buff Studio Co., Ltd. that pulls players into a haunting yet surprisingly heartfelt adventure. As Eugene, a character who stumbles into the realm of ghosts and narrowly escapes a monstrous fate, you find yourself working at the mysterious Underworld Office under the watch of an enigmatic ghost. With a mix of horror, humor, and genuine emotion woven into every chapter, this adventure game delivers an experience far removed from typical story templates. Playing it on PC through MuMuPlayer brings the whole narrative to life on a larger screen with greater comfort.

The game stands out for the sheer variety packed into its visual novel format. Players can discover up to 7 distinct story routes depending on the choices they make, while around 40 short animations and over 150 illustrations give every scene real visual character. Completionists can chase down 25 collectible titles and 60 album illustrations, adding long-term replay value beyond just following the main storyline. Unique puzzles are scattered throughout, and the chat-style storytelling format keeps interactions feeling dynamic rather than passive. The cast of ghosts ranges from cute to stern, from twisted to touching, making each episode feel genuinely distinct.

Bringing Underworld Office to PC via MuMuPlayer means you can read and react to every chat-style story segment on a full-sized display without squinting at a phone screen. The mouse and keyboard setup makes navigating choices and puzzle sections more precise and comfortable, especially during longer sessions exploring multiple story routes. MuMuPlayer also ensures stable performance so the animations and illustrations render smoothly throughout, letting you fully appreciate the detailed artwork Buff Studio has built into every episode.

About the Game

Underworld Office: Story Game is not your average interactive novel. Developed by Buff Studio Co., Ltd., this adventure game drops players into an unusual world where the living and the dead collide in ways that are by turns eerie, funny, and genuinely moving. The premise centers on Eugene, an ordinary person who falls into the ghost world by accident and nearly meets a grim end at the hands of monsters. Salvation comes from an unexpected source: a mysterious ghost who rescues Eugene but immediately demands repayment in the form of labor at the Underworld Office. What follows is a layered, character-driven journey through episodes that range from innocent and lighthearted to dark and unsettling.

What sets this game apart from other visual novels and story-driven titles is how deliberately it was crafted to break away from familiar formats. The storytelling uses a chat-based structure that keeps the pacing brisk and the interactions personal, making conversations with the game's cast of ghost characters feel immediate rather than distant. The characters themselves are a real highlight, each one balancing contradictory traits in ways that make them memorable. Some are playful, some are stern, some carry sadness beneath a cheerful surface, and learning more about each of them rewards patience and curiosity.

Here is a closer look at what the game offers:

7 unique story routes unlocked through the choices you make throughout the game
Approximately 40 short animated sequences that bring key moments to life
Over 150 illustrations spread across the full story
25 collectible titles and 60 album illustrations for players who want to explore everything
Puzzle sequences woven into the narrative that add variety to the gameplay flow
A free-to-play model with an optional paid version that removes ads and the ticket system for unlimited access

The branching structure is one of the strongest reasons to return to Underworld Office more than once. Choices made during conversations and key story moments genuinely shift where the narrative goes, meaning a second or third playthrough can feel meaningfully different from the first. Finding all seven routes is a goal that rewards attentive players who think carefully about how they respond to each situation rather than just clicking through.

The visual presentation also deserves recognition. Buff Studio selected authors carefully for the writing and matched that investment with a strong library of artwork. The illustrations cover a wide emotional range, reflecting the tonal variety in the episodes themselves. Whether a scene is going for something funny, spooky, or quietly heartbreaking, the visuals tend to support the mood effectively.

For players who enjoy visual novels, mystery games, chat-style story games, or interactive fiction in general, Underworld Office offers something worth investing time in. It suits those who have grown tired of recycled story structures and want a narrative that actually goes somewhere unexpected. The ghost-world setting provides a backdrop rich enough to support both standalone episodes and a larger ongoing story, with Buff Studio signaling that more content is on the way. Whether you are in it for the story, the collectibles, or simply the experience of a well-built free adventure game, Underworld Office delivers on multiple fronts.