Aside from what you get from the App Store, only web games are going to work on your iPad. Hope this helps.
Viewing post in iPad compatible?
“mac or window download file types” run on exactly those systems: Mac OS and Windows. iOS is neither of these things.
Browser games should run on it, though it would depend on the age of the iPad. You can check if your iPad supports WebGL using this website: https://get.webgl.org/. If it supports WebGL, most browser games won’t have any trouble running. You might run into problems if the game requires a keyboard, though.