No particular order:
Vampires: The Masquerade - Bloodlines
Star Wars Galaxies (pre-cu)
Ultima Online
Disco Elysium
Gizmos and Gadgets
Ultima, SWG, and Gizmos and Gadgets were more about the memories of playing them with friends/family.
SWG still has some unique mechanics that I still view as the high tide of major publishers willing to take risks on complexity. Game was probably too ambitious for its own good.
Vampires had a high level of jank even years after release, but boy did they nail the ambiance/music/open approach to quests for the time. Shame about the sequel.







Their normal search is now near useless as well.