Battle Difficulties

#==============================================================================
# Battle Difficulties
# Version 1.1
# By Szyu
#
# About:
# Enables stronger and weaker battle difficulies
#
# Instructions:
# - Place below "▼ Materials" but above "▼ Main Process".
#
# How to Use:
# Call script with "$game_party.set_difficulty(x)", where x represents one of
#  the keys in the difficulty set GAME_DIFFICULTIES
#  $game_party.set_difficulty(:normal)
#
# Updates (Pastebin):
# http://adf.ly/4920670/battle-difficulties
#
#==============================================================
#   * Configuration
#==============================================================

# Set of difficulties
GAME_DIFFICULTIES = {
  :easy   => 0.75,
  :normal => 1.0,
  :hard   => 1.35,
  :insane => 4.0
}
# Difficulty when started new game
START_DIFFICULTY = :normal

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#==============================================================
#   * Game_Party
#==============================================================
class Game_Party < Game_Unit
  alias init_game_dif_sz initialize

  attr_reader :game_difficulty
  attr_reader :difficulty_rate

  def initialize
    init_game_dif_sz
    @game_difficulty = START_DIFFICULTY
    set_difficulty(@game_difficulty)
  end

  def set_difficulty(dif)
    @game_difficulty = dif
    @difficulty_rate = GAME_DIFFICULTIES[@game_difficulty]
    apply_new_difficulty
  end

  def get_difficulty_text
    return @game_difficulty.to_s
  end

  def apply_new_difficulty
    db_en = load_data("Data/Enemies.rvdata2")
    $data_enemies.each do |en|
      next if en.nil?
      en.gold = (db_en[en.id].gold * @difficulty_rate).to_i
      en.exp = (db_en[en.id].exp * @difficulty_rate).to_i
      for i in 0..en.params.size-1
        en.params[i] = (db_en[en.id].params[i] * @difficulty_rate).to_i
      end
      for i in 0..en.drop_items.size-1
        en.drop_items[i].denominator = (db_en[en.id].drop_items[i].denominator * @difficulty_rate).to_i
      end
    end
  end
end

#==============================================================
#   * DataManager
#==============================================================
class << DataManager
  alias load_dif_sz extract_save_contents

  def extract_save_contents(contents)
    load_dif_sz(contents)
    $game_party.set_difficulty($game_party.game_difficulty)
  end
end