gambosite/app/controllers/player_controller.rb

class PlayerController < ApplicationController
  def show
    @player = Player.find(params[:id])
    @games = Game.where(winner: @player.name).or(Game.where(loser: @player.name))
    @player.alternate_players.each do |alt|
      @games += Game.where(winner: alt.name).or(Game.where(loser: alt.name))
    end
  end
end