Tiny Cthulhu

Tiny Cthulhu is a rules-lite Lovecraftian horror game using the minimalist TinyD6 engine. Classless and low-prep, it focuses on tense investigations, perilous choices, and fast resolution with a handful of d6s. Ideal for one-shots, convention play, and quick campaigns that emphasize mood over mechanics.

At-a-glance

Cosmic Horror • 2-5 players • Needs GM • 2/5 complexity • One-shot friendly

Tiny Cthulhu

Adventures range from shadowy investigations and occult conspiracies to nautical terrors and weird science. The text leans into tone and texture, giving you the prompts you need to conjure creeping unease at the table.

Theme and Setting

At its heart, Tiny Cthulhu uses the hallmark TinyD6 approach: roll 2d6 for a standard test, adding a third die when you have Advantage; any 5+ is a success (two successes for exceptional results, depending on the module in use). Characters are quick to create—pick a few Traits that define capabilities and fears—and advancement is intentionally light.

How Play Feels

Optional modules layer on sanity tracks, stress, conditions, and investigative tools when you want more texture, but the default remains fast and fiction‑first. Combat is swingy and brief by design, privileging choices and consequences over tactical granularity.

What Makes It Distinct

You want denser mechanical crunch or build complexity You want combat and action to drive most of the session. You want denser mechanical crunch or build complexity You want combat and action to drive most of the session.

Where It May Not Fit

You want denser mechanical crunch or build complexity You want combat and action to drive most of the session.

Decision guide

What this game is about

Key facts
Players
2-5 players + GM
Session
120-180 minutes
Prep
Low
Play profile
Complexity
2/5
New GM Fit
5/5
Roleplay Focus
5/5
Combat Focus
2/5
Tactical Depth
0/5
Campaign Depth
3/5
Who it suits
Best for
Tables that want fiction-first play and scene-level consequencesTables that want quick onboarding and low mechanical dragPlayers who want character, atmosphere, or story to matter more than pure tactics
Avoid if
You want denser mechanical crunch or build complexityYou want combat and action to drive most of the sessionYou want the system to stay almost invisible at the table

A strong fit for groups that want fiction-first play and scene-level consequences, with classless helping define the experience.

Agent data

Structured data and an explicit decision profile JSON document are available for remote agents.

Open agent JSON