Difficulty System

#==============================================================
# http://thiagodd.blogspot.com.br
#
# [TSDA] Difficulty System
#   --> Version 1.0
# by thiago_d_d
#
#--------------------------------------------------------------
# * Features
#--------------------------------------------------------------
# + Adds an simples difficulty system. With it, the enemies will
#   be weaker or stronger during battle. The system is controled
#   by variables, so you can use the difficulty in other systems.
#
#--------------------------------------------------------------
# * Install
#--------------------------------------------------------------
# Put this script above Main
#
#--------------------------------------------------------------
# * Configuration
#--------------------------------------------------------------
# Go to the D_VARIABLE_ID line and put there the ID of the
# variable you want to store the difficulty.
# The value of this variable can be
#    *0 - Normal difficulty
#     Normal enemy atributes.
#    *1 - Hard difficulty
#     50% increased enemy atributes
#    *2 - Very Hard difficulty
#     70% increased enemy atributes
#    *3 - God difficulty
#     100% increased enemy atributes
#    *4 - Easy difficulty
#     40% decreased enemy atributes
#==============================================================
module TSDA
  D_VARIABLE_ID = 1
end
#--------------------------------------------------------------
class Game_Enemy
  alias old_str str
  def str
    str = old_str
    return str = apply_dificulty(str)
  end
  #------------------------------------------------------------
  alias old_dex dex
  def dex
    dex = old_dex
    return dex = apply_dificulty(dex)
  end
  #------------------------------------------------------------
  alias old_agi agi
  def agi
    agi = old_agi
    return agi = apply_dificulty(agi)
  end
  #------------------------------------------------------------
  alias old_int int
  def int
    int = old_int
    return int = apply_dificulty(int)
  end
  #------------------------------------------------------------
  def apply_dificulty(atribute)
    variable = $game_variables[TSDA::D_VARIABLE_ID]
    case variable
    when 0
      return atribute
    when 1
      return (atribute * 1.50).to_int
    when 2
      return (atribute * 1.70).to_int
    when 3
      return (atribute * 2).to_int
    when 4
      return (atribute * 0.6).to_int
    end
    return atribute
  end
end