This site has lots of free to play in browser classic MS Dos Games
https://archive.org/details/softwarelibrary_msdos_games/v2
They all look a bit dated now but I had a play of a few and a reminisce
https://archive.org/details/softwarelibrary_msdos_games/v2
They all look a bit dated now but I had a play of a few and a reminisce