Cards on the Fly in One-2-One

Cthulhu Confidential and other upcoming One-2-One games recommend using physical cards (or the digital equivalent) in play. Giving a player something to hold onto has several benefits.

  • It’s a reminder. In a multiplayer game, key plot elements get discussed endlessly at the game as players speculate about what’s going on, how they rid themselves of troubles, and how they can take advantage of items or favour acquired. In a solo game, especially a plot-heavily Confidential scenario, it’s good to give the player plenty of reminders of important discoveries and ongoing problems.
  • It’s a call to action. Having “Bleeding Internally” or “Mickey Don’t Like You” weighing down your hand motivates you to look for ways to counter those pesky problems. Similarly, if you’ve got “Charlie Chaplin Owes You” or a “Spare Bomb”, then you’ll itch for ways to play them to your advantage.
  • It’s satisfying. There’s something undeniable fun about handling physical cards, as opposed to scribbling notes on a character sheet. And as there’s only one player, it’s viable to have lots of highly specific cards.

Every published One-2-One scenario includes plenty of Problem and Edge cards, covering every likely eventually – but what about unlikely ones, when the player goes “off-piste”? How to improvise cards on the fly?

Have a bunch of blank cards (index cards are fine) to hand. When you need to write a card on the fly, quickly think about ways to connect it to future events in the scenario. A problem like “Fear of the Dark” is only interesting if there’s a scene later on where the player has to go into a dark place. An Edge like “Colt .45” is only relevant if there’s a good chance of a shootout.

The best Problems are the ones that push the player in interesting directions in the story, or anticipate future dangers. A “Bleeding Neck Wound” that gives the player a penalty is fun, but “Vampire Bite” that doesn’t give a penalty, but hints at a psychic threat can be much more interesting. At the same time, you want a few cards with clear mechanical benefits or penalties for variety, to avoid overloading the player with possibilities.

Edges without a defined benefit leave things open to player input. “Colt .45” obviously benefits Fighting, but “Got The Drop On Them” could be construed as a bonus to anything from Stealth to Shadowing to Fighting, or a Push to Streetwise or Intimidation, to a story benefit where the player gets to arrive at just the right moment to put the bad guys at a disadvantage. Working out what a card actually does when it’s played keeps options open – just stay away from Edges that give the player too much leverage over key figures in the adventure. “Charlie Chaplin owes you” is great; “The Cult Leader owes you” risks derailing your plot again. (And if you’re running a game where Chaplin’s the cult leader, I want to play).  

As a quick list of options:


  • A bonus (say, +1 or +2) to a single Challenge
  • A bonus to multiple Challenges, either when a particular condition is met (+2 when sneaking around Budapest) or for a limited time (+2 to your next two Fighting challenges)
  • A bonus to an entire category of General Abilities (Physical, Mental, Manual)
  • A free die on a Challenge (and remember, if the player has any dice left over, he gets a free Push)
  • A free Push in a particular situation (“You know this city like the back of your hand. Discard this Edge for a free Push of Architecture, Cop Talk, or Streetwise while in Prague.”)
  • A free Push when dealing with a particular character or faction
  • A free Push for a particular type of Investigative Ability, usually Interpersonal
  • The ability to Counter a type of Problem
  • A general description of some advantage, giving the player scope for creativity (“The priest blessed you.)


Injuries: Injuries are a special category of Problem, so include the Injury keyword on any Injury cards. Some abilities (like Medic) give the ability to counter Injuries quickly.

Most injuries give a -1 or -2 penalty to Physical tests; injuries that specifically impede hand-eye Co-ordination might penalise Manual tasks instead.

In GUMSHOE One-2-one, the player doesn’t have ‘hit points’ or a Health score. The penalties from injury cards may stack, but a player may hold any number of injury cards and keep going. Injury only threatens death if the injury card specifically says this (see Dooms, below.).

Light injuries might only last for a scene, or for a few scenes (usually, three scenes, or three Challenges of a particular type), or be automatically Countered when the player Takes Time. More serious injuries might explicitly require the player to Take Time to Counter them, require medical treatment, or both.

Penalties: Penalties make it harder for the player to succeed in tests. Penalties are usually -1 or -2; go to -3 or -4 if you really want to emphasise the adversity and give the player little hope of success without Countering the problem. Penalties apply to one (or more!) of the categories of General Ability:

    • Physical: Most injuries penalise physical abilities; it’s hard to run, climb or fight when you’re been hurt. Drugs or restraints (manacles) also impair physical ability tests.
    • Manual: Injuries to the hands or eyes are the usual cause of manual ability penalties.
    • Mental: Shock, mental trauma, emotional distress or exhaustion can hit mental abilities

Levies: Levies require the player to spend an extra Push in a particular situation. Usually, this refers to Interpersonal pushes and applies to a particular individual or group – if Dr. Tollen doesn’t trust you, you might have to spend an extra Push when trying to persuade her with Reassurance to let you see her notes on blood diseases. Levies can apply to any investigative ability, though – for example, if Cryptography is needed to decode an ancient book, then if the book gets damaged, it could impose a Cryptography levy to get the information.

Blocks: Blocking Problems prevent the player from taking a particular action until the Problem’s resolved. They can be nuisances that prevent the player from tackling bigger issues, like an Injury card (“Blood in your eyes”) that gives no penalty to tests, but has to be Countered before any other injuries can be removed. They can be more serious complications that restrict the player’s actions – for example, if the player’s been disarmed, then she can’t make Shooting tests until she obtains a gun.

Dooms: Doom Problems shape the ending of the story, usually in a negative way. If the player’s still holding the card at the end of the operation, bad things happen. Dooms can result in death (“you’ve been poisoned – if you haven’t found a cure by the end of the adventure, you’re dead”) or other terrible consequences (“The cult has kidnapped Lenny, and will sacrifice him to Cthulhu unless you stop them”). Dooms should always describe how to Counter them.




4 Responses to “Cards on the Fly in One-2-One”

  1. Allan says:

    Great article thanks

  2. Andr0ss says:

    Will a Edges/Problems cards deck be published in the near future?

  3. Ben says:

    Second on Andr0ss. The moment you offer up cards(woven please) you can take my money.

  4. Michael Daumen says:

    Although it risks straying away from roleplaying, there are many card-driven mechanics from other games that can be used too. Adding a symbol or color to cards allows set collection, for example (a player with three Wound Problems has additional complications – but each First Aid Edge cancels out a Wound). Numerical values could be used as an ordinal device (cards with the lowest number must be used or resolved first), a countdown (10 points of cult Problems and the ritual begins!), a weight (the player must have X points in his hand to accomplish an indirect goal; or no more than Y Edges), or even currency (trade in X points of Edges for an even better one).

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