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Kekko

Why cards in a game design?

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Hello all, 
 
Have you made a game design involving cards, tabletop or otherwise? Why did you put cards in there? What were the other options? Could the same mechanic have been displayed differently, especially in a video game? What core mechanic do cards provide in tabletop card games and what is the equivalent in a computer game? I'd like your thoughts on this since a lot of card mechanics (in video games) feel gimmicky to me especially when they display the actual card. I want the mechanic but do not want to be bound by the aestethic, so what's the mechanic?
 
One thing they do in tabletop games is providing a tangible marker of some kind. This is where the gimmic feeling comes from when translated into a computer. Sure, every inventory item in an rpg could represented by a card, every module in a spaceship, every regiment in an army. But on a computer that's just an aesthetic choice, not a mechanic. 
 
So what can we learn from cards? Here are some of my thoughts on what mechanics cards provide and how it relates to computers without actually showing cards on the screen. Faithful translations of tabletop card games (i.e. Poker online) doesn't count, nor does switching from cards to Scrolls.
 
1) Collectibility
Disclaimer: I've never played neither CCG's, TCG's nor miniature games so I don't actually know what I'm talking about.
Clearly CCG's proves that you can collect them. This they have in common with miniatures. World of Tanks is an example of this, but it feels more like miniatures than cards in that you get exactly what you buy rather than a random set of cards.
An example of this collecting mechanic would be a game where you recruit troops. Using standard clichés, you can send your recruiter to a dwarf village, a human village or elf village to get a certain kind of recruits, but the exact composition is random. 
 
2) Fog of War
In RL, cards are useful to keep information concealed from you yet available to me. Or concealed from all of us in the deck. In computer games it's very easy to conceal information from players (I'm ignoring hacking and hot-seat issues for now) so we do that in all kinds of ways. Actual fog of war, hiding unit statistics, line-of-sight, etc...
 
3) The Wonderful World of Discrete Mathematics and Probability
When you play a card in a card game, they can be thought of as actions. This means that you as a player can make decision trees: IF you do that, THEN I counter with, OR etc...
One way we do this in games is with various rock-paper-scissors mechanics: IF you get cavalry, THEN I get pikes.
 
4) The Deck
When you have a deck of cards it can be used as a resource with some randomness thrown in. In video games we do resource management in all sorts of ways, like health/mana, budgets, etc.
Remember my recruit troops example above? If that was an in-game action rather than something you bought or got "between" games, it could be an analogy to drawing a card from the deck: "You got a company of archers!"
 
5) Limits
As a thinking tool they might provide limits, in a positive sense. If you tend to have feature-itis in your designs (like me) then the limitation that *all* information about a unit, item or whatever should fit on a "reasonably sized" card could be a good one.
 
What other ways can you think of that cards are used in games, tabletop or otherwise? 
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What core mechanic do cards provide in tabletop card games and what is the equivalent in a computer game?

 

In a tabletop game, cards provide random characters and situations (and sometimes, outcomes). In a computer game, you can simply introduce a character, who introduces a situation and has AI.

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I think cards can be thought of as a "super die".

 

A stack of cards offers a controllable, tuneable randomness, not limited to 6 sides (or any number of sides). You can have as many cards in the deck as you deem appropriate, and as many duplicates as you wish, not being limited by a physical property (other than what fits on the table). You can even add "expansion packs" later if necessary (which means extra $$$). Further, a card can hold much more information than just a number, which is greater convenience for the player (no 10 minutes browsing tables in the DM's book).

 

Lastly, a stack of cards introduces strategy and player skill. The experienced player knows that there are only 2 moles and 2 vampire rabbits in the deck. Vampire rabbits give a +30% win chance on everything but moles, whereas moles instantly kill rabbits but lose to everything else. So, after you've played two moles already, the experienced player knows that it's safe to play a vampire rabbit.

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I've played with board game developers and had a blast using placeholder objects according to a set of rules in place for the game. Could have been done on a screen or whatever, or some bottle caps, toothpicks, a piece of paper, and dice. There were definitely mechanics based on the rules.

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From the strictly physical side, as already noted by others, nothing beats cards for presenting detailed information about an individual object; in fact most displays of information about one of many similar objects turn into pseudo-cards in videogame user interfaces, even if they aren't used as such. Therefore using cards or not depends only on having objects that are suitable for a card metaphor because they behave like cards: accessing sequentially the elements of random permutations of a large set, using them as a discrete and coarse-grained resource that can be accumulated (usually to offer the players the option of doing more or better moves when they matter in exchange for doing little in other turns), exchanging them for other cards or comparable objects, hiding and showing them, etc.
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I want the mechanic but do not want to be bound by the aestethic, so what's the mechanic?
...
But on a computer that's just an aesthetic choice, not a mechanic.

I think you are muddling things up a bit here.

Cards are a form of presentation that suits some designs and game mechanics better than others. Even in physical games there are no mechanics that absolutely require cards. For example, picking a random subset of a collection of objects is actually more convenient with a set of solid chips and an opaque container than by shuffling a deck of cards.

On a computer, card presentation is not just a matter of subjective taste. It's a matter of usability, accessibility and affordance. When some objects in the game behave like physical cards, showing them as such helps the player in understanding the game space. Conversely, you should probably avoid such presentation for game objects which behave in ways fundamentally unlike physical cards, even if you like the aesthetic.

The fundamental card property which the presentation conveys is immutability. The card itself does not change over time and has no internal state. This is tremendously helpful for reasoning about the system as a whole (see: functional programming).

The secondary card property is that a card can only exist in one discrete state at a time, visually indicated by which zone it occupies in the game (such as "in hand", "in deck", "attached to card X on the table", "on table and face down", "discard pile"). Card mechanics either move cards between these states, or apply passive effects from cards to elsewhere in the game.
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As mechanics go cards are inferior in computer world (you can do everything card can by other means better on a computer), except for the mood. There seems to be a relatively strong attachment to cards (as representation of things on the screen) I was inquiring players and made some topic here and generally the "cards idea" had a warm welcome.

 

I would say the best things of cards is to actually show cards on the screen. People seem to like it.

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Case1: A card game, or a board game with cards. Result: it is just easier to use cards and nobody thinks twice.

Case2:
We look for iconic figures, for stability.
Gambling and money are tokens that frequent card use. Although they are not the staple of stability we're quite looking for, they do mean something, fun. These cards are more fun for people who use them frequently.
We can quickly imagine the complex rules a single card governs, and its importance, just like in reality our gambling and credit cards have so many rules. So slap on whatever rule you want, someone who reads it is less likely to laugh at it and throw it away.

We trust our icons to a fault.

Promise of collection raises obsession in goal oriented individuals.
Having many different cards creates a bountiful story, even if there's a single passage on each card we hold. People love stories, and can't always accept an ending, maybe this can emulate a good book.

You simply want to reach an established fan base. Maybe even you yourself have a bit of a card addiction and thought this was the greatest idea in the world. (Ok, maybe it is, just look at past examples, it's a working business model).

Result: Suddenly you've made a pinball game with cards that mechanically shuffle for visual and sound effects.
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As mechanics go cards are inferior in computer world (you can do everything card can by other means better on a computer)

In a computer, rand is basically our dice.
Let's say that in a game, you've got a 50% chance to hit, so on a regular dice you'd have to roll a 4/5/6 to hit or 1/2/3 to miss (or in a computer, use rand).
The alternative with cards is you make a bunch of 'hit' and 'miss' cards, and put the same number of each into a deck. When you draw a card you put it into a 'used' pile, which is reshuffled once the whole deck has been used.

There's a *huge* difference between these two approaches, which a professional game designer will be aware of: the amount of statistical variance in the outcomes.
Flipping a coin and getting 10 heads in a row is extremely unlikely, but if you flip a coin all day long, it will eventually happen. Likewise, if enough people play your game then it's a statistical fact that one of them will roll misses for their first hundred rolls, will be killed by the first beetle that they fight a few times and decide that your game sucks ;)
Decks allow you to put limits on the variance, e.g. At the extreme, your deck only has 1 hit and 1 miss card, which guarantees that you can't have a miss streak longer than two misses.

Slot machine designers use both the raw probabilities and the variances ruthlessly to tweak different games to different demographics, for great profit.
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Because it's understandable and familiar.   Everyone just knows how a deck of cards work, so when a player gets lucky/not they don't get upset(where as if you hid it was played as a deck of cards they'd see the game playing against them).

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The mechanic is giving a bunch of storable options to a player.

(or sometimes a hidden goal, although technically that is an option that comes available after reaching the goal)

Mechanic of the deck is to bring some randomization.

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Have you made a game design involving cards, tabletop or otherwise?

 

As a lone indie developer with a tiny budget, I find cards much cheaper to produce.

 

E.g. It is cheaper to order 5 pieces of art (can be just head shots or half body portrait) to make 5 cards that represent creatures, then slide the cards around on screen to represent movement/combat. Than it is to order 5 3D creature models or full body sprites, animate them, and order all sorts of effects for movement/combat.

 

Then, sell the game as a card game and save a bunch of money and development time. :)

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Have you made a game design involving cards, tabletop or otherwise?

 

As a lone indie developer with a tiny budget, I find cards much cheaper to produce.

 

E.g. It is cheaper to order 5 pieces of art (can be just head shots or half body portrait) to make 5 cards that represent creatures, then slide the cards around on screen to represent movement/combat. Than it is to order 5 3D creature models or full body sprites, animate them, and order all sorts of effects for movement/combat.

 

Then, sell the game as a card game and save a bunch of money and development time. smile.png

LOL, how true.

But you can make Minecraft it has even less art assets required and still is a bit popular (also I have seen colones that don't even have any textures, just coloured cubes, the ultimate dream for a programmer :D).

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