These are games designed to run on web browsers or via standalone files that can bypass the filters of institutional networks (like those in schools or offices).
GitHub - ccported/ccported.github.io: Long list of links to games ccported unblocked games repack
Gamers typically seek out these repacks for several reasons: These are games designed to run on web
In the gaming community, a "repack" is a version of a game that has been highly compressed to reduce file size. This makes them faster to download, though they often take longer to install as the system must decompress the files. which often requires administrative privileges.
Many of these repacks are "portable," meaning they can be run from a USB drive without needing a full system installation, which often requires administrative privileges.