The Black Hack
The Black Hack is David Black's fast, class-based OSR fantasy TTRPG: roll-under d20 tests, usage dice, armor points, and a strong GM toolkit for dangerous low-prep dungeon play.
Fantasy OSR • Needs GM • 3/5 complexity • Low prep
The Black Hack is one of the clearest ways to get old-school dungeon fantasy to the table without committing to a large retroclone. It is strongest for groups that want quick character creation, dangerous exploration, player-facing rolls, and a GM toolkit that supports improvisation instead of page-flipping. If your table wants classic adventure pressure with modern speed, it does that job unusually well.
It is a weaker fit if your group wants deep character builds, tightly balanced tactical combat, or a setting-heavy core book that tells you exactly what the world should be. The system is intentionally light, so part of its appeal is that an experienced GM can turn a small rules chassis into a lot of momentum.
What the game is
Designed by David Black, The Black Hack is a fantasy OSR TTRPG built from original-era D&D assumptions but rewritten around fast roll-under d20 tests, player-facing defense rolls, usage dice, and armor points. The current product line centers on The Black Hack 2nd Edition, with physical products sold through Squarehex and the PDF sold on DriveThruRPG.
Its default identity is not a bespoke setting so much as a compact engine for classic fantasy expeditions: delves, wilderness travel, resource pressure, risky combat, and problem-solving that depends more on player decisions than on character build complexity.
Publication history and editions
The publicly mirrored open-game-content text identifies the first edition as The Black Hack v1.2 from 2016, a very slim booklet that established the core chassis of roll-under tests, abstract ranges, usage dice, and class-based old-school play. The current official line is The Black Hack 2nd Edition, an expanded 124-page release whose store page says the main rules still take about 30 pages while the rest of the book adds tables, monsters, dungeons, traps, magic items, and other GM support.
That second edition also picked up a visible industry credential: the official 2019 ENNIE Awards page lists The Black Hack 2nd Edition as the Silver Winner for Best Layout and Design. That matters here because presentation is part of the line's appeal; the game is not just short, it is designed to be scanned and used quickly.
Product line and what you need to play
If you want the actual current game, start with the second-edition rule book or the PDF. The checked Squarehex line also includes a boxed set, a lower-cost rule booklet, Classic Monsters in hard and soft cover, a monster folio booklet, spell and prayer booklets, character sheets, and a GM's screen.
I did not find a current official free quickstart in the checked source set. The closest free sampling path is the open game content mirror, which exposes the earlier rules text and makes it easy to see whether the chassis fits your table before buying the fuller second-edition support material.
Major adventures, supplements, or modules
The official line reads more like a toolkit line than an adventure-path line. The standout official add-ons in the checked sources are support pieces such as Classic Monsters, the monster folio, the spell and prayer booklets, and the boxed set. In practical terms, The Black Hack is usually most valuable when paired with classic or compatible old-school adventures rather than when treated as a self-contained campaign setting.
Third-party ecosystem and community support
The game's long-term influence is larger than its official shelf would suggest. The open content site exists specifically so people can reuse, translate, and hack the text, and it currently presents versions in multiple languages. Combined with the game's short core chassis and OSR compatibility, that has made The Black Hack more of a launchpad than a closed line: many tables use it as a base to run existing modules, bolt on house rules, or branch into adjacent lightweight fantasy hacks.
Core rules and play structure
The foundational idea is simple: when a character attempts something risky, the player rolls a d20 and wants to come in under the relevant attribute. That same player-facing logic also handles defense. In the first-edition open rules, monsters generally do not roll to hit; when a monster attacks, the player rolls to avoid the hit with the appropriate stat. That one decision does a lot of work: it keeps turns moving and puts pressure directly on the players.
The chassis adds a few signature procedures that give the game its own feel. Usage dice track consumables like torches, rations, oil, and ammunition by degrading the die size instead of counting every unit. Armor points absorb damage until rest restores them, which makes armor feel like a depleting resource instead of a passive number. Abstract ranges replace gridded precision with Close, Nearby, Far-Away, and Distant positions, making theater-of-the-mind combat and exploration easier to run.
Leveling is also deliberately compact. The open rules drop traditional XP counting in favor of advancement through surviving meaningful stretches of play such as sessions, dungeon levels, quests, or major events. That choice says a lot about the intended table rhythm: this is a game about surviving expeditions and learning through consequences, not optimizing reward loops.
Characters, roles, and advancement
The Black Hack is class-based. The open rules present four core classes: Warrior, Cleric, Conjurer, and Thief. That gives the game a familiar old-school silhouette while keeping the class list small enough that new players can understand it quickly. Classes determine starting hit points, allowed gear, damage, and a few signature abilities rather than opening long trees of build choices.
In play, that means characters differentiate through class, equipment, luck, and what happened to them in actual adventures more than through character-planning mini-games. If your table likes discovering a character by surviving with them, that is a strength. If your table wants build depth before session one, it can feel thin.
Signature mechanics
The mechanics that most clearly define the game are the roll-under player-facing core, the usage die, armor points, and the way spellcasting asks Clerics and Conjurers to test after casting to see whether spell slots are depleted. None of those are individually difficult, but together they create a play loop where attrition matters, turns resolve fast, and the GM can keep focus on pressure rather than on exception handling.
Those same procedures also explain why the game keeps showing up in OSR recommendation lists. It does not merely imitate classic fantasy adventure; it compresses it into a form that is easier to teach and easier to run quickly.
What play feels like
At the table, The Black Hack tends to feel brisk, exposed, and improvisational. Characters come together quickly, combat rounds move fast, and exploration decisions matter because supplies, damage, and positioning are all simplified without being erased. The tone depends heavily on the GM and the module, but the rules repeatedly push toward danger, scarcity, and tactical caution rather than superheroic certainty.
It is especially good for groups who enjoy asking practical questions, taking risks with partial information, and accepting that a light chassis does not protect them from bad choices. It is less satisfying for groups who want the rules themselves to generate a lot of social drama, narrative prompts, or encounter balance.
Running the game
The official second-edition product copy makes a strong practical promise: the full book expands a short rules core with a large amount of GM-facing support. That is one of the game's main advantages over many tiny OSR pamphlets. You are not only buying a slim engine; you are buying tables and support material that help you turn that engine into sessions with limited prep.
That said, low prep is not the same thing as low judgment. The GM still needs to adjudicate rulings, pace risk, decide consequences, and know when the lightness of the rules is helping or when the table needs a firmer call. New GMs can absolutely learn it, but the best fit is someone who likes being an active referee rather than someone who wants every edge case pre-solved.
Campaign fit
The Black Hack works well for one-shots, short arcs, and ongoing campaigns built around expeditions, site-based play, and modular adventures. Because characters are quick to replace and advancement is uncomplicated, it handles casualties and restarts better than many heavier fantasy games. It can sustain a campaign, but the campaign is usually carried by the adventures, locations, and consequences the group builds in play rather than by a long character-build arc.
If your campaign dream is a rules-light sandbox with dangerous dungeons and portable modules, this is a strong candidate. If your campaign dream is a long progression of intricate character options and encounter-balance tuning, it is not aiming there.
Reception and awards
The most durable praise around The Black Hack 2nd Edition is that it is fast, usable, and easy to adapt. The official ENNIE result for layout supports the common claim that the book is not just short, but efficiently presented. The current DriveThruRPG product listing and review synthesis also point in a consistent direction: people tend to like the speed, hackability, and utility of the GM tools.
The recurring caveats are also fairly consistent. Some players bounce off the line's presentation and tonal choices, and some groups want a little more long-campaign structure or balance than this chassis tries to provide. That does not make the design weak; it just means its virtues are concentrated in clarity, portability, and momentum rather than in completeness.
Where it is strongest
- Fast onboarding for fantasy groups that want OSR pressure without a large rules reference.
- Excellent support for dangerous dungeons, improvised rulings, and expedition-style play.
- Memorable lightweight procedures such as usage dice and armor points that keep resource pressure visible.
- Strong compatibility mindset for tables that want to run classic old-school adventures.
Where it can frustrate groups
- Very light character-building depth if your group enjoys optimization or long build planning.
- High reliance on GM judgment despite the low prep burden.
- Less tactical exactness than players may expect if they prefer grid play and carefully balanced combats.
- No strong default setting identity to do the heavy lifting for campaign tone.
Content and safety notes
Expect old-school fantasy danger: traps, dungeon violence, scarce supplies, unpredictable fights, and a real chance of character loss or lasting injury. The game's pressure comes more from peril and attrition than from explicit shock content, but it is still best approached as a lethal adventure game rather than as cozy fantasy.
Best starting path
If you already know you want the real line, start with the second-edition PDF or the current rule book. If you are unsure whether its style suits your group, read the open rules text first to see how the core procedures feel, then move to second edition for the fuller GM support. If your table wants ready-made material, pair it with a classic old-school module rather than waiting for the core line to provide a campaign path.
Research notes
Last checked: July 13, 2026.