A Game includes one or more Survivors and Zombies.
A Game begins with no Survivors and Zombies
A Survivor can be added to the game (but not after it started)
A Zombie can be added to the game (but not after it started)
A Game ends immediately if there are no Survivors or no Zombies.
Each Survivor and Zombie has a Name. The Name is unique for the game
Each Survivor and Zombie begins with 0 Wounds
If a Zombie attacks a Survivor it makes a Wound.
A Survivor who receives 2 Wounds dies immediately and is converted into a Zombie.
A Zombie who receives 5 Wounds dies immediately.

Iteration #2: Equipment

Each Survivor can carry up to 5 pieces of Equipment.
Up to 2 pieces of carried Equipment are "In Hand"; the rest are "In Reserve".
Examples of Equipment: "Baseball bat", "Frying pan", "Katana", "Pistol", "Bottled Water", "Molotov".
A Survivor can attack a Zombie with an Equipment in hand.
Each Equipment makes different amount of Wounds.
Each Wound a Survivor receives reduces the number of pieces of Equipment they can carry by 1.
If the Survivor has more Equipment than their new capacity, choose a piece to discard automatically.
A Survivor can discard Equipment to pick up another one.

Iteration #3: Experience

As Survivors overcome zombies, they gain experience.
Each Survivor begins with 0 Experience.
Each Survivor has a current Level.
Each Survivor begins at Level Blue.
Each time the Survivor kills a zombie, they gain 1 Experience.
Levels consist of: Blue, Yellow, Orange, Red.
- When a Survivor exceeds 6 Experience, they advance ("level up") to level Yellow.
- When a Survivor exceeds 18 Experience, they advance to level Orange.
- When a Survivor exceeds 42 Experience, they advance to level Red.
A Game has a Level (Level here is identical to Level for a Survivor).
A Game begins at Level Blue.
A Game Level is always equal to the level of the highest living Survivor's Level.

Iteration #4: Output

The Game includes a running history of events that have taken place as it has been played. Managing game history is a Game responsibility.
A Game's History begins by recording the time the Game began.
A Game's History notes that a Survivor acquires a piece of Equipment.
A Game's History notes that a Survivor is wounded.
A Game's History notes that a Survivor dies.
A Game's History notes that a Survivor levels up.
A Game's History notes that the Game Level changes.
A Game's History notes that the Game has ended when the last Survivor dies.

Credits