A so called "arty game" that manages to use actual gameplay to help tell its story rather than feeling like an after thought
Fallout: New Vegas
Need I say anything that hasnt been said about one of the all time great western RPGs that marries old school RolePlaying depth and character writing with more modern accessible FPS gameplay?
Dark Souls
Self explanatory
What Remains of Edith Finch
A great game and exemplar of the "walking sim" genre but a lot more involved than many of its peers
Disco Elysium
Possibly the greatest RPG of all time
Total War: Shogun 2
The best total war game to date (don't @ me). Streamlined in ways that make the experience better but without losing the soul that makes these games great and the realm divide solves the perennial steam roller problem of becoming to powerful for the endgame to be fun.
XCOM: Enemy Unknown
Excellent turnbased strategy game, again streamlined to be more accesible but retaining the core appeal of these games, wonderful potential for emergent player storytelling and organic tension with player permadeath
Consortium
My honest favourite Immersive Sim after Deus Ex. And like its father, quite janky combat.
Thomas Was Alone
If less is more, Thomas Was Alone is the apex of game design. Does a lot with very little.