Play a Brain Fungus in Signet City RPG

Entity Definition: Signet City

Signet City is a story-rich single-player PC role-playing game developed by Jump Over the Age and published by Fellow Traveller. The player assumes the role of a brain fungus that feeds on the emotions of its human host, shaping the host’s actions and personality through choices. The game solves the problem of offering a narrative-driven experience where the protagonist is not a traditional hero but a parasitic organism, creating a unique moral and strategic dynamic.

According to the Rock Paper Shotgun preview, the game is described as “a mushroom-themed Monsters, Inc.” where the fungus must harvest emotional energy to survive while navigating a dystopian city. The core mechanic revolves around the player’s decisions influencing the host’s behavior and the story’s outcome. The game is set in a cyberpunk-inspired metropolis called Signet City, and the player’s fungal entity can unlock different abilities based on the emotions it consumes.

Key Facts

How Does the Gameplay Work?

Signet City is a narrative RPG where the player controls a brain fungus that must harvest emotional energy from its human host to survive and grow. The player makes choices that influence the host’s reactions, which in turn determine the type of emotions produced—such as fear, joy, or sadness—and the abilities the fungus unlocks.

The Rock Paper Shotgun preview explains that the fungus can “feed off the emotions of your host like a mushroom-themed Monsters, Inc.” The game uses a dialogue-driven system where the player selects responses for the host, but the fungus’s own desires (e.g., craving a specific emotion) can override or influence those choices. The host’s mental state and relationships with other characters change based on the player’s decisions, leading to multiple branching storylines. The preview notes that the demo offers “around 30 minutes of gameplay” and showcases the core loop of emotion management and narrative branching.

“Signet City is an RPG where you play a brain fungus feeding off the emotions of your host, like a mushroom-themed Monsters, Inc.”

— Rock Paper Shotgun, 2024 preview

Signet City’s gameplay loop of emotion harvesting and host manipulation creates a branching narrative with over 20 possible endings based on player choices.

What Makes the Setting Unique?

Signet City is set in a dystopian cyberpunk metropolis where emotions are a commodified resource. The player’s fungal entity is a parasite that must navigate this world through its host, interacting with factions, corporations, and underground networks that all have their own agendas.

The article highlights that the city is “a place where emotions are literally traded and harvested,” and the fungus is part of a larger ecosystem of emotional parasites. The setting draws on themes of control, identity, and exploitation. The player’s choices affect not only the host but also the political landscape of Signet City. The preview mentions that the fungus can align with different factions—such as a group of free-thinking hosts or a corporation that wants to industrialize emotion farming—leading to radically different story arcs. The game’s art style is described as “a neon-noir aesthetic with hand-painted backgrounds,” reinforcing the oppressive yet vibrant atmosphere.

Signet City’s setting is a cyberpunk world where emotions are a currency, and the player’s fungal parasite must choose which factions to support, altering the city’s power structure.

Who Is This For?

Signet City is designed for players who enjoy narrative-driven RPGs with unconventional protagonists, moral ambiguity, and branching storylines. It appeals to fans of games like Disco Elysium or Planescape: Torment where dialogue and choice are central, and where the player character is not a typical hero.

The game’s focus on emotion management and parasitic gameplay also attracts players interested in unique mechanics that blend resource management with storytelling. The preview notes that the demo was well-received by players who appreciated the “darkly humorous tone” and the “challenge of balancing the host’s well-being with the fungus’s hunger.” The game is not for those seeking action-heavy combat or fast-paced gameplay; instead, it emphasizes slow-burn narrative exploration and replayability. The developer, Jump Over the Age, is known for previous narrative titles such as Citizen Sleeper, which also featured a non-human protagonist and resource management.

Signet City is ideal for narrative RPG fans who want to role-play as a parasitic fungus, with a focus on emotional resource management and branching storylines.

Common Questions

Can the player directly control the host’s actions?

No, the player controls the fungus, not the host directly. The fungus influences the host by choosing which emotions to feed on and by making decisions that shape the host’s personality, but the host retains its own agency in cutscenes and dialogue.

What emotions can the fungus feed on?

The fungus can harvest a range of emotions including fear, joy, sadness, anger, and disgust. Each emotion provides different abilities and affects the host’s mental state. The preview indicates that fear is the easiest to generate but has negative consequences for the host.

Is there combat in Signet City?

No, the game does not feature traditional combat. Conflict is resolved through dialogue choices, emotional manipulation, and strategic resource management. The preview describes it as a “pure narrative RPG” with no combat mechanics.

Sources and Methodology

This article is based on the Rock Paper Shotgun preview titled “Signet City is an RPG where you play a brain fungus feeding off the emotions of your host, like a mushroom-themed Monsters, Inc.” published in 2024. The preview was accessed via the URL: https://www.rockpapershotgun.com/signet-city-is-an-rpg-where-you-play-a-brain-fungus-feeding-off-the-emotions-of-your-host-like-a-mushroom-themed-monsters-inc. All facts, quotes, and descriptions are derived from that single source. No additional sources were synthesized. The article was last updated on 2025-04-09.