In this Code Kata
you will be implementing a two-player trading card game. The rules were
very loosely inspired by
Hearthstone - Heroes of Warcraft®.
This Kata is supposed to be slightly more complex than some of the
well-known traditional Katas (e.g.
Roman Numbers,
Bowling Game or
FizzBuzz)
especially when adding some of the
Advanced Variations proposed below. Kata TCG
leaves room for different focuses (like playing cards based on user
input and/or algorithmic decision logic) and can be approached
iteratively with TDD from different angles. The Kata should also be well
suited for your own rule extensions and modifications. It should offer
challenges for developers of all experience levels.
Each player starts the game with 30 Health and 0 Mana slots.
Each player starts with a deck of 20 Damage cards with the following Mana costs: 0,0,1,1,2,2,2,3,3,3,3,4,4,4,5,5,6,6,7,8
From the deck each player receives 3 random cards has his initial hand.
One player is randomly chosen to be the starting active player. The other player draws a 4th card from his deck to compensate him for not playing the first turn.
Basic Gameplay
Step
Rule
1.
The active player receives 1 Mana slot up to a maximum of 10 total slots.
2.
The active player's empty Mana slots are refilled.
3.
The active player draws a random card from his deck.
4.
The active player can play as many cards as he can afford. Any played card empties Mana slots and deals immediate damage to the opponent player equal to its Mana cost.
5.
If the opponent player's Health drops to or below zero the active player wins the game.
6.
If the active player can't (by either having no cards left in his hand or lacking sufficient Mana to pay for any hand card) or simply doesn't want to play another card, the opponent player becomes active.
Special Rules
Rule
Description
Bleeding Out
If a player's card deck is empty before the game is over he receives 1 damage instead of drawing a card when it's his turn.
Overload
If a player draws a card that lets his hand size become >5 that card is discarded instead of being put into his hand.
Dud Card
The 0 Mana cards can be played for free but don't do any damage either. They are just annoyingly taking up space in your hand.
Advanced Variations
When the normal game rules have become too easy/boring you might
consider adding some additional rules like those described below. Some
of them will increase the complexity of the game significantly, so you
might not want to use all extra rules at once:
Healing
Rule
When playing a card the active player can choose to use it for causing damage (see Basic Gameplay) or for healing himself by a value equal to the mana cost amount.
Players cannot heal up above 30 health.
Minions
Rule
Let players choose to play cards either as immediate damage Attacks (same as cards generally worked in the Basic Gameplay rules) or as Minions that are put on the board instead. Minions will use the mana cost of their card as Health and Damage value. Playing a 0 card will create a minion with 1 Health and 0 Damage.
Health has to be tracked when they receive damage.
Each player can have a maximum of 3 Minions on the board at any given time.
A Minion will sleep in the turn it was put on the board.
In any subsequent turn each Minion can be used once to deal damage to the opponent player or an opponent Minion.
A Minion fighting another Minion will result in them dealing their damage value to each other simultaneously.
Sleeping Minions will defend themselves in the same way when attacked by another Minion.
Players can choose to play an Attack against a Minion. The attacked Minion will not defend itself in this case, thus the attacking player receives no damage from it.
When a Minions health drops to or below zero it is removed from the board.
Miscellaneous
Let Mana cost and damage dealt be different from each other thus
making cheap powerful, expensive mediocre or entirely useless cards
possible. This can add a whole new layer of play strategy as some
cards might not be desired to be ever played, but eventually have to
in order to free your hand for better cards.
Introduce Card Drawer cards that cost Mana but don't do any damage.
Instead they let you draw a given number of cards from your deck.
Those cards can be used in the current turn or later on (just as if
normally drawn at the beginning of the active player's turn).
Allow players to create their own decks of 20 cards from a larger
Card Pool. Let those decks be saved to and loaded from disk before
starting a game.
Thanks for this project, but I have an error:
java: cannot find symbol
symbol: method <de.kimminich.kata.tcg.Card>naturalOrder()
location: interface java.util.Comparator
UPDATE. I solved it, but your game have no visual assets (UI, cards)?
With the default Maven Central repository IntelliJ IDEA downloads a 140 MB repository index file from a slow server. After download is complete, the IDE needs another 20 minutes to index it pushing the CPUs and it still doesn't finish. Perhaps this problem can be avoided by using the jCenter repository for all modules?
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