Here is informative content regarding What is 3kh0? 3kh0 (pronounced “Ecko”) is a well-known name in the unblocked gaming community. It refers to a collection of web-based games (HTML5, Flash, Unity) specifically designed to bypass network restrictions commonly found on school or work computers. The Role of Bitbucket Bitbucket is a Git repository hosting service (similar to GitHub) owned by Atlassian. 3kh0 famously used Bitbucket to host a static website that contained hundreds of unblocked games.