Pirates! Gold on commodore, was the first game i can remember i could start playing it after dinner and before i knew it it was 3 4 am.
Some of the Final Fantasy games over the years FFX eating a good chunk of months.
All the mass effect games i will play obsessively from the get go no sleep no eat until i pass out from exhaustion, made the end of 3 that much worse.....
Minecraft when i first got the game and was just exploring digging hours would go by lost underground trying to find the way out. And when i got more buildy just getting that last wall done or that moat or that archway can just go on under its own momentum.
Total War has it when you are in a good campaign, even empire the bug ridden mess it is, some of the campaigns and battles were epic as hell and easily would consume hours upon hours as you tried to hold off your enemies or crush them utterly, or shogun get those rebellions under control, or try to get the enemy ninja before they can kill your best general, or the emperor and everyone declares war on you at once, loved that in the vanilla game.