Обычная консольная RPG (ООП)

def start
    @hero_hp = 100
    @enemy_hp = 100
 
    puts "> Ready? YES | NO"
    game = $stdin.gets.chomp.upcase
    if game == "YES"
        attack_enemy
    else
        puts "\n> Game Over"
    end
end
 
def attack_enemy
    hero_damage = rand(51) + 50
    puts "\n> Hero's damage = #{hero_damage}"
    
    @enemy_hp -= hero_damage
 
    if @enemy_hp <= 0
        puts "\n> You win!"
        victory
    else
        puts "\n> Enemy's hp = #{@enemy_hp}"
        attack_hero
    end
end
 
def attack_hero
    #Герой умрет, если не будет атаковать противника
    enemy_damage = rand(20)
    puts "\n> Enemy's damege = #{enemy_damage}"
 
    @hero_hp -= enemy_damage
    puts "\n> Hero's hp = #{@hero_hp}"
 
    if @hero_hp <= 0
        death
    else
        puts "\n> Continue attacking? YES | NO"
        choise = $stdin.gets.chomp.upcase
        if choise == "YES"
            attack_enemy
        else
            death
        end
    end
end
 
def victory
    puts "\n> Congratulations!!!"
end
 
def death
    puts "\n> Game over. Play again? YES | NO"
    choise = $stdin.gets.chomp.upcase
    if choise == "YES"
        start
    else
        puts "\n> ;("
    end
end
 
start

class Unit
  def initialize(hp)
    @hp = hp
  end
 
  def add_hp hp
    @hp += hp
  end
 
  def sub_hp hp
    @hp -= hp
  end
 
  def print
    p @hp
  end
end
 
class Hero < Unit
end
 
class Enemy < Unit
end
 
class Beast < Enemy
end
 
class Berserk < Enemy
end