Shadow of Mordor is a great game, if you´re into the Batman-like combat style. On the other hand, the nemesis system alone probably is something that may make it worth for some people.

SoW is a great sequel to SoM which suffered from some launch problems, but otherwise is a great continuation. The only problem I really have with this sequel is the "endgame" which in my opinion can drag on for a bit too long and it also makes a difference on which platform you play on PC. GoG for example, from what I´ve seen, has no barracks. (so you can´t buy or trade orcs or upgrades, but don´t take this as fact, just a warning)

RDR2 is a Masterpiece. There is nothing more to say, if you´re thinking about playing it, just do it already, you´re missing out otherwise.