Metro Exodus

4A Games decided to try something different with Metro Exodus. You're no longer trapped in linear metro tunnels, the majority of the game instead taking place on large surface maps. This fact seems to have chased off few fans of the previous games but the open world isn't as lame nor scary as some may think. There are no copy-pasted points of interests; everything is meaningful and following the main objective can still offer quite a linear experience. Taking the time to visit the few optional locations is very much worth it, though, for weapon accessories and suit upgrades.

Metro: Last Light Redux

Metro: Last Light is a direct sequel to Metro 2033 and, unlike its predecessor, it has a completely original story, though Dmitry Glukhovsky did work on it as well. Interestingly enough, the author also used many of Last Light's details in his Metro 2035 novel later: for instance, Miller's daughter Anna.

Metro 2033 Redux

Originally released in 2010 and 2013, the post-apocalyptic first person shooters Metro 2033 and Metro: Last Light developed by 4A Games, were released a second time in 2014 as remastered Redux versions. Some of the gameplay and even visual changes apparently weren't to the liking of every fan -- for the first game in particular -- but if you're starting the series from these, you don't really need to worry about the differences between the remasters and the originals.