A repo filled with 300 offline games that can each run on a single file. This is a good option if you are having internet connectivity issues, or you're at some place with restricted internet.
Usage: Download and extract the repository as a zip file to save all the games for offline use. It may take a while to download fully. ( ~ 4.2 GB decompressed). You can also use git to clone the repository.
The downside of inlining everything is the file size. If you're running the files via an online code editor, it may be better to use the single-file html. Note that it requires internet.