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Hack100: Simple, Flexible d100 GamingClick to magnify
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Hack100: Simple, Flexible d100 Gaming



Simple, Flexible d100 Gaming

Hack100 is an old-school flavoured percentile-based tabletop role-playing game in which characters can be created in minutes and the vast majority of in-game actions are covered by around a dozen, rather than dozens of, skills.

The system is extremely flexible, eschewing standard lists of professions, skills, powers and creatures in favour of a freeform, collaborative approach.

The intention is to provide a streamlined system that is quick, easy and intuitive to use. This allows a game to flow naturally with minimal interruptions for the referencing of rules.

  • Classic percentile-based d100 system.
  • Suitable for most genres of role-playing game – fantasy, sci-fi, cosmic horror, etc.
  • Includes full rules for:
    • Character creation and development.
    • Task resolution.
    • Combat.
    • Powers (e.g. magic).
    • Customised non-player characters and creatures.

Note: pages 2 and 35 of the PDF, the insides of the front and back covers, are blank to facilitate printing as an A5 booklet.

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Reviews (1)
Discussions (2)
Customer avatar
Brian C March 19, 2023 4:40 pm UTC
In Hack100, can the 20% or 10% bonus to an Ability at character creation instead be applied to a beginning character’s starting Specialism?

That way, say, a medical doctor character is guaranteed to be the best in medicine, even when another beginning character rolls exceptionally well in their Reasoning Ability score.

Rules as written, a beginning character who rolls two tens on an Ability score and then adds their 20% bonus gets a 60% starting score, whereas starting Specialisms top off at 50% (unless the 10% or 20% bonus at character creation can also be applied).
Customer avatar
Joe C March 19, 2023 5:58 pm UTC
Hi Brian,

Strictly speaking, rules as written, no. But I think that would be fine as a house rule.

Also, bear in mind that, I wouldn’t equate a "Medical” Specialism with a general “Reasoning” Ability when it comes to something like first aid. Even if the scores were the same, when performing first aid I’d either apply an appropriate Difficulty Modifier (easier for the specialist, harder for the generalist) or allow the specialist a better potential outcome (e.g. 1-5 Health healed for the Specialist, just 1 point for the generalist).


Customer avatar
Norbert L May 15, 2022 6:00 pm UTC
Great little book! I want Ducks and Shadowcats :)
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Product Information
Rule System(s)
File Size:
1.98 MB
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File Last Updated:
April 29, 2023
This title was added to our catalog on October 04, 2021.
Hack100 RPG
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