Unblocked online games refer to games that are not restricted or blocked by firewalls or other internet filtering systems. These games can be accessed and played on various websites without any restrictions. They are usually popular among students who want to play games during their free time at school, as many educational institutions restrict access to certain types of websites, including gaming sites. Unblocked online games can include various genres, such as puzzle, action, sports, and strategy games. Many of these games are free to play and can be enjoyed on different devices, including desktop computers, laptops, and mobile phones.