Minesweeper from the Microsoft store is bigger than a standard Win98 install. :)
The Microsoft Teams chat application uses 200MB to 550MB of RAM when idle.
My all-time favourite example of high-density software is Super Mario 64, which weighs in at 8MB.
Of course, a great deal of effort must have gone into squeezing it down to 8MB, and it wouldn't be reasonable to ask modern developers to go to those lengths, but still.