GamesRadar - Like the first game, Metro 2033, there is a secret alternate ending that can be found if you happen to make the right moral choices throughout the game. Some choices are given, some need to be achieved quickly, and some are cleverly hidden. When you perform certain actions in Metro: Last Light, you will see the screen slightly flash white and there will be a short tone that accompanies it. When you see this happen, you’ve done a good thing and it’s what you want to find. You’ll also want to make sure that you do not kill any soldiers throughout the game.