CAIN

CAIN is one of the clearest choices for a table that wants occult investigation to matter when the violence starts. It gives the players powerful psychic exorcists, then places those characters inside a cruel institution and sends them after monsters created by human trauma. The result is stylish action-horror with a moral bruise: you can be frighteningly capable and still have very little control over what the job makes of you.

Choose it when your group wants case-based play, strange powers, escalating pressure, and finales shaped by what the exorcists learned. Look elsewhere if you want cozy paranormal mystery, detailed grid tactics, emotionally light drop-in play, or uncomplicated heroic monster hunting.

What CAIN is

CAIN is a narrative occult-horror TTRPG designed and illustrated by Tom Bloom, also known for Kill Six Billion Demons, Lancer, and Magnagothica: Maleghast. Players portray exorcists: psychic soldiers employed as tools of CAIN, a global supranational shadow organization dedicated to finding and executing SINS.

SINS are not generic demons. They manifest when a latent psychic's trauma and suffering break loose into a supernatural abomination. That origin makes the investigation structurally important. Learning what happened to the host and understanding the emotional logic of the SIN can weaken it or create leverage during the final Execution.

The core book supports character creation, SIN creation, complete Hunt structure, character sheets, and Hunt sheets. It is a self-contained game rather than a setting supplement or a Lancer expansion.

Publication history and current edition

Tom Bloom released CAIN digitally in August 2024 through CHASM, his solo imprint. The game has received regular balance, layout, and rules updates rather than being left at its original release state. Version 1.1 arrived in October 2024, version 1.2 in June 2025, version 1.3 in November 2025, and version 1.4 in June 2026.

As of August 2026, the current download is version 1.4.5, released July 20, 2026. That update focused on editing fixes, clarifications, and nested PDF bookmarks. The purchase includes spread and single-page versions of the roughly 150-page core book plus separate character sheets.

CAIN is currently sold as a paid PDF on itch.io. The official listing does not offer a printed core book or an official virtual-tabletop package. Community copies appear when available, but they are a limited-access program rather than a permanent free quickstart.

Official supplements and the wider ecosystem

The core book is the complete starting point. Ongoing official support appears in Tom Bloom's semiannual Games for Freaks zine, which mixes CAIN material with content for other CHASM games:

• Issue 1: the Virtues system, adding powerful psychic figures and new campaign possibilities.
• Issue 2: Drifters, strange denizens of the psychic sea that can complicate Hunts.
• Issue 3: new Blasphemies, Agendas, and Perfect SINS.
• Issue 4: Quirks that alter exorcist powers and recreation activities for bonds and downtime.

Issues 1 through 3 are currently name-your-own-price back issues; Issue 4 is the current paid volume. Tom Bloom's itch.io page also curates a large CAIN expanded-universe collection of third-party Hunts, SINS, character sheets, and campaign tools. Treat those as community creations rather than official canon, but they give an Admin far more ready material than the core page alone suggests.

How the rules work

CAIN uses pools of six-sided dice. On a typical action roll, results of 4 or higher count as successes. The Admin usually does not roll a conventional opposing check; a separate risk die helps determine the severity and shape of consequences when an action is dangerous. This keeps the exorcists competent without letting success erase uncertainty.

The rules are lighter than the book's dense visual identity may imply. They are built to maintain pressure, reward creative use of psychic abilities, and give the Admin concrete ways to escalate. They are not a tactical-grid engine and do not try to reproduce the build optimization or positional combat of Lancer.

• Action dice answer whether an exorcist accomplishes what they attempt.
• The risk die gives danger a mechanical voice even when the action succeeds.
• Pressure and Tension keep delay, failure, and exposure from becoming consequence-free.
• Talismans track progress and harm within conflicts without requiring a battle map.
• Blasphemies are expressive psychic powers whose usefulness and danger are part of character play.

Our CAIN guide to SINS, Blasphemies, and Hunts goes deeper into those procedures. The item page stays focused on the full game, its publication line, and whether it belongs at your table.

How a Hunt changes the final fight

A Hunt moves from a mission briefing into investigation, escalation, and a climactic Execution. The opening information may be partial, sanitized, or shaped by CAIN's priorities. The exorcists enter the affected place, speak with survivors and witnesses, trace psychic evidence, and discover the harm behind the SIN.

That inquiry is not a narrative waiting room. Discoveries can strip away a SIN's protections, reveal the rules of its Palace or lair, and give the team options it would not otherwise have during the Execution. This is CAIN's most important design promise: understanding the victim and the horror is useful in play, not merely good roleplaying before the boss fight.

The best finales therefore ask more than whether the team can kill the target. They force choices among speed, safety, compassion, obedience, and the personal cost of using power. A technically successful mission can still reveal that CAIN's solution protected the institution more than the people caught in the case.

Exorcists, Blasphemies, and becoming the threat

Exorcists begin as dangerous psychics rather than helpless investigators. Their Blasphemies are broad, dramatic tools, and the game expects players to use them imaginatively. The useful character question is less “what is the optimal attack?” than “what impossible thing can my power do here, and what risk am I willing to accept?”

That power is not clean. Exorcists are nascent monstrosities themselves, close enough to the forces they hunt that their expanding abilities and bodies become part of the horror. An exorcist's imago makes the boundary between hunter and SIN personal. Campaign advancement increases capability, but it also gives the table more material for deterioration, institutional dependence, and character consequences.

Characters work best when they have a reason to need CAIN, a reason to resent it, and relationships the job can place under strain. The game supports flashy concepts, but its staying power comes from watching those concepts collide with human cases and organizational control.

What play feels like

A strong session feels like a pressure cooker. It begins with a clean order and becomes morally untidy as the team learns whose suffering created the crisis. The visual and tonal register is closer to lo-fi manga collage, hostile bureaucracy, and brutal supernatural action than to candlelit occult scholarship.

Players have room to theorize, investigate, and improvise with powers, but the game keeps pushing toward action. The Admin escalates the situation when the team hesitates or exposes itself, and the SIN's presence should become harder to contain. By the Execution, the group should understand enough to make deliberate choices without being promised a safe one.

CAIN can be funny, stylish, and even exuberant at the table. Those moments help rather than hurt the horror. The key is that the campaign does not mistake relentless misery for depth; small victories and real relationships give the losses something to press against.

Running CAIN as the Admin

CAIN calls its GM the Admin. The rules are learnable, but running the tone well is a more demanding job than teaching the dice. A weak Hunt is only a monster concept followed by a fight. A strong Hunt has a human wound, several affected people with different needs, evidence that changes the finale, and an institutional demand that may conflict with the humane answer.

Prep is best kept focused. Give the SIN an emotional origin and practical threat; prepare three useful clues, two people who want different outcomes, one escalation track, and a Palace whose imagery reflects the case. Then let player theories and choices change the route to the Execution. A sprawling fixed plot is less useful than a situation that can react.

The risk die and Hunt sheets give the Admin mechanical structure, so the game is not pure freeform improvisation. Even so, a first-time GM may find the thematic load difficult. A contained published or community Hunt is a better starting point than an elaborate original campaign.

One-shots and campaign play

A single Hunt can make a forceful one-shot if the group begins with ready exorcists and keeps the case contained. This is one of the better ways to test the system: briefing, two or three investigative locations, escalation, Execution, and a short aftermath can fit a focused session.

CAIN also supports campaigns, and the official supplements add more long-form tools. Short runs of three to six Hunts are especially strong because they give institutional politics, recurring civilians, relationships, and psychic deterioration time to matter without exhausting the core case structure.

Longer campaigns need deliberate variation. Change the kind of harm at the center of each Hunt, revisit consequences, and let the exorcists' relationship with CAIN evolve. If every mission is only “new SIN, new location, new fight,” the structure will flatten.

Reception

CAIN drew attention quickly after its 2024 release. Polygon called it tabletop gaming's “horror hit of the year,” praising the combination of familiar influences, visual design, and a dice system that refuses to release the pressure. Rascal's later critical essay treated the game as a commentary on societal and institutional violence rather than only a stylish monster-hunting premise.

Reader response is also unusually strong for a small digital-first TTRPG: the official itch.io listing had more than 200 ratings and a 4.9-out-of-5 average in August 2026. That enthusiasm is visible in the expanding library of fan-made Hunts and supplements. It is not evidence that the game fits every table, but it does show that CAIN's specific mix of aesthetic confidence, mechanical pressure, and moral horror has found a committed audience.

Where CAIN is strongest

• Investigation has a payoff: learning the SIN's origin changes the Execution instead of merely unlocking it.
• Power and horror coexist: exorcists are formidable, but their power does not make them safe or morally clean.
• The procedures reinforce the premise: the risk die, pressure, and Hunt structure keep institutional urgency present.
• The book has a singular identity: Tom Bloom's lo-fi manga, collage, and album-cover influences make the game immediately recognizable.
• Support is healthier than it first appears: four official zines and a broad fan ecosystem provide options beyond the core book.

Where it may frustrate a table

• It is not Lancer with exorcists: combat is narrative and consequential, not grid-based or build-driven.
• The Admin carries thematic responsibility: cases need emotional clarity, useful clues, escalation, and restraint around difficult material.
• The intensity is structural: trauma, dehumanization, institutional abuse, body horror, and moral injury are not incidental flavor.
• The core loop can repeat: long campaigns need varied case structures and meaningful aftermath.
• Official support is digital-first: there is no current printed core book or official VTT implementation on the product page.

Content and safety fit

CAIN is a high-intensity horror game. Its monsters are born from trauma, its protagonists are weapons of a coercive organization, and its imagery can move through body horror, abuse, violence, dehumanization, and psychic corruption. Pitching it only as edgy anime monster hunting understates what the game asks of the table.

Use a Session Zero to agree on the kind of horror the group wants, establish lines and veils, and choose a way to pause or redirect scenes. Give content notes before each Hunt, especially when a case centers on abuse, religion, addiction, coercion, or bodily harm. Our TTRPG safety-tools guide offers a practical starting process.

Best starting path

1. Start with the core PDF: version 1.4.5 contains everything required to make exorcists, create SINS, and run Hunts.
2. Learn the Hunt-to-Execution loop first: understand how clues become leverage before adding optional systems.
3. Run one contained Hunt: use ready characters or build a small case with a clear emotional center and a short escalation list.
4. Add supplements selectively: the Games for Freaks material is valuable, but Virtues, Drifters, Perfect SINS, Quirks, and expanded downtime work best after the table understands the core.
5. Decide whether to campaign: if the group wants recurring consequences and institutional pressure, build a three-to-six-Hunt arc rather than committing immediately to an open-ended series.

CAIN is worth the extra care when your table wants the investigation, the monster, and the institution to wound the same story from three directions. Its distinctiveness should remain visible—but the current game and product line are substantial enough to deserve a full reference profile.

Research notes

This profile was checked against the official CAIN product page and official development log for the current version, included files, release history, and availability. Official supplement details come from Games for Freaks Issue 1, Issue 2, Issue 3, and Issue 4. Reception context was checked against Polygon's 2024 feature and Tom Bloom interview and Rascal's critical essay. Availability and rating details were last checked August 12, 2026.