display a 404 and keep the path

routes.js

// THE QUESTION: How could I display a 404 page and keep the path in case '/games/wrong-id'.

// ------------------------------------------------------------------
// ROUTES CONFIG
// ------------------------------------------------------------------
import * as auth from './helpers/authenticationHelper';
import React from 'react';
import {
  Route,
  IndexRoute
} from 'react-router';

/**
 * @see https://github.com/ReactTraining/react-router/blob/v3/docs/API.md#onenternextstate-replace-callback
 *
 * @param {Object} netState
 * @param {Function} replace
 * @param {Function} next
 */
const redirectForGame = (netState, replace, next) => {
  if (!auth.isLoggedIn()) {
    replace('/auth/enter');
    next();
  }

  next();
}

export default (
  <Route path="/" component={App}>

    <IndexRoute
      component={LessonsContainer}
    />

    <Route
      path="/games/:id_game"
      component={GameContainer}
      onEnter={redirectForGame}
    />
    <Route path="*" component={Page404} />
  </Route>
);

// ------------------------------------------------------------------
// AJAX CONFIG
// ------------------------------------------------------------------

import axios from 'axios';
import { browserHistory } from 'react-router';

export const ajax = axios.create({
  headers: {
    'Content-Type': 'application/json'
  },
  timeout: 2000,
 
  transformRequest: [
    (data) => {
      return JSON.stringify(data);
    }
  ],

  validateStatus: function(status) {
    
    if (status === 404) {
      // browserHistory.replace(`${window.location.pathname}`)
    }
  
    //if (status >= 500 && status < 600) ;
    //if (status === 401) return true;

    return status >= 200 && status < 300; // default
  }
});