I think it was already asked and sorry if so, ut I couldn't find it. What is your most favorite videogame? What is a videogame you spent the most hours on? looking for something to play
The one I've spent the most hours on is surely Dudes of Stuff and Things, which I made and which you could find in this very thread and download and see if your computer plays it. I forget if the DOS version is the one posted, but if so, there's DOSBox, some software you can find somewhere on the internet that allows these older games to be played.
Dudes was my take on Heroes of Might and Magic 2 and 3, so if Dudes is no good for you, there you go. You can get them at gog.com, they have lots of older games in forms that will play on modern computers. They're cheap and you download them.
These days if I play a game on my computer, and it's not Dudes, odds are it's either one where you build up a hero while exploring a fantasy or sci-fi world and the combat isn't so good, which is to say it's a Bethesda game, with Fallout 4 being the latest; or it's a flash game that you can play for free on e.g. kongregate. There are lots of really classic flash games, man. Look for a category you like and go through the top-rated ones and you will find good ones.
Mostly I play video games on consoles, and by consoles I mean Nintendo consoles. Zelda: BotW and Super Mario Odyssey were both great. Before them on the Wii U, Super Mario 3-D World, Rayman Legends, Pikmin 3. On the 3DS, A Link Between Worlds. Those are all mainstream hits and well they deserved to be.