The 'Ranger' ending is considered the canonical ending, as it is very similar to the novel.

As the realization dawns on Artyom, so does the fact that he cannot do anything to stop the missiles, as they are a last thought going through his head. In the Metro 2033 novel, Artyom realizes that the Dark Ones are not as hostile as he had originally thought, and actually would assist humans in surviving the harshness of metro life, as they were -as the book says- 'someone who could help establish communications between their deaf and blind elder brothers – with people'. In Metro Exodus, there is the 'Your Destination' ending, where Artyom lives and becomes the new leader of both the Order and a new community at Lake Baikal, and the 'Eternal Voyage' ending, where Artyom dies of radiation poisoning. In Metro: Last Light, there is the 'C'est La Vie' ending, in which Artyom and the Rangers sacrifice themselves and D6 to save the metro, and a 'Redemption' ending, in which the Baby Dark One brings the surviving Dark Ones to help save Artyom and the Rangers by turning the tide of the battle. For Metro 2033, there is an 'Enlightened' ending, where Artyom makes a decision of saving or destroying the Dark Ones, and a 'Ranger' ending, where Artyom simply destroys them by the orders of Hunter.

There are two Endings for Metro 2033, two endings for Metro: Last Light, and two endings for Metro Exodus, both based on the moral choices that the player makes throughout the game. This article contains plot information that may spoil major story aspects for the reader.

Good ending metro 2033 redux