I discovered today that my most played game on Steam is Astronner with about 500 hours, and my second most played is Surviving Mars with about 500 hours.
20 years ago before I had a wife, a child, pets, or a mortgage and when I had a simple job, I would destroy weeks at a time with some Final Fantasy 8. Logged obscene hours, unlocked every secret and beat every minigame, more than once. There's just no time in my life now for a game requiring that kind of time commitment, but there's always the memories