WikiCardsGoogle PlayPlay now

The Wikipedia card gamestudio IVRYN

Play on iPhone nowFree in Safari. Add it to your Home Screen.Play

WikiCards · Card list · Science cards · Caffeine

Epic card · Science

Caffeine, an Epic card

Caffeine is a central nervous system stimulant of the methylxanthine class and is the most commonly consumed psychoactive drug globally.

From the Wikipedia article

Rarity
Epic
Domain
Science
ATK
94
DEF
88
Power
182
Wikipedia reads a year
600,000

Power 182 (ATK + DEF): stronger than 95 % of WikiCards cards.

Get it onGoogle PlayPlay nowFree, no ads, no account needed. WikiCards plays free in Safari, nothing to install.

Caffeine quiz: 3 questions

Three questions on the Caffeine card, the way WikiCards duels ask them. Pick an answer, the facts are just below.

  1. Find the missing word

    Caffeine has a three-dimensional structure similar to that of adenosine, which allows it to bind and block its ______.

    Answer

    receptors. Caffeine has a three-dimensional structure similar to that of adenosine, which allows it to bind and block its receptors. From the Caffeine article on Wikipedia.

  2. Which of these cards hits hardest (highest ATK)?

    Answer

    Civil rights movement. Civil rights movement 100 · Caffeine 94 · Bali 89 · Cattle 86 ATK in WikiCards.

  3. Which of these Wikipedia articles is read the most in a year?

    Answer

    Bali. Bali 1,200,000 · Cattle 850,000 · Caffeine 600,000 · Tree 470,000 Wikipedia reads over a year.

In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.

The facts on the card

The card carries these facts from its Wikipedia article.

Why it is Epic

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Caffeine article was read about 600,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 94 and blocks with 88: each hit it takes is cut by 35 %.

How to get Caffeine

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

More Science cards

Cards close in power

The cards just above and just below Caffeine in the power ranking, all domains together.

Card lists

Credits

Text : Wikipedia, Caffeine (revision), CC BY-SA 4.0. Photo : Vaccinationist, Public domain, Wikimedia Commons.

WikiCardsThe Wikipedia card gameInstall