Where should I begin?
Let’s start with ms-dos:
Any Sierra Online title.
Ween: The Prophacy
Any Zork Series game
EA The Dig
Myst
Lighthouse
More modern:
The Sims (any in the series, heck any Maxis game for that matter)
Rollercoaster Tycoon (any in the series)
Age of Empires (any in the series)
Red dead redemption 1 @ 2
Grand Theft Auto 3, Vice City, 4, and 5.
Sea of thieves
Fallout 4
Fallout New Vegas
Skyrim
Witcher 3
Anno 1880
American Truck Simulator (more engaging than d4)
Farming Simulator 2020 (more engaging and rewarding than d4)
The more I think about it… it’s really just a Blizzard thing now I guess. All the said games were finished upon release and were FUN to play for years.