Public domain ROMs are similar to homebrew titles in that they are not copyrighted and anyone who wishes can download and play them. PDRoms is one of the largest public domain sites on the web with thousands of ROMs for dozens of consoles. You can find titles for anything from 3DO to Watara Supervision here.Here are the best websites to play retro games online.Old game shelf.Retro games.Classic refill.Online emulator games.Play classic games.My online emulator.