Amazing list. I personally would add couple games, that defined my "gaming hobby":
- XCOM/UFO: Enemy Unknown - not sure how this fits in the list, but it was ground breaking for me: perfect blend of micro- and macro management, strategical decisions, tactical battles, what a great game and so much memories of it (and I'd put honorable mention of Jagged Alliance 1&2 here, 'cause they are very similar concept)
- Civilization - genius idea, one of the 4X pioneers, easy to pick up, hard to master, and so much replay value; its overall depth is quite a feat, especially given it's from 1991, no wonder the franchise is still alive and well now
- Fallout - esp. 1 & 2 might not be the best gameplay-wise, but their world building, characters and atmosphere are excellent... and everyone knows the legendary intro "War, war never changes..."
- Planescape: Torment - similar to above, amazing world, unbelievable story, one of a kind game
- Gothic - mainly 1&2 were simply awesome, there are no barriers (ahem), the world is your to explore, but it's deadly so you have to plan your progress, nothing is streamlined for you; I can't remember different game with such a vibe (other than piranha bytes later production)
- VtM: Bloodlines - kind of similar to Deus Ex, but also taking from the table top; and in my book it has THE best atmosphere of all the games I've played
- Witcher - this might be just European thing, but playing especially W1 felt kind of like folklore fairy tale from childhood turned into pretty grim adult game
- Disco Elysium - this is probably the only "sort of new" game that I've played and which definitely deserves a place in the list, great characters, amazing story and writing

there are plenty of others too, but my brain farts