Uos

Uos is a free internet-based multiplayer 3D roleplay-based learning environment, where you can learn what an ID card is, how to apply for one, what a bank card is and how to use it. It also explains about PIN codes, state levy, dividends, digital prescription, salary, income tax, VAT, etc. In addition, the game has a lot of tasks and other fun activities, like rally, paintball, designing clothes, publishing a magazine, pets, etc.

The game runs on Unity and the development cost about €286,000; it was funded by the Estonian government to teach citizens in a playful manner. Character speed regulation and high scores are sent from the client to server without checks, this allows speedhacking and editing of scores; however rarely admins have corrected leaderboards.

The game was played internationally for a moment in 2019, when YouTuber "aksually" made a video showcasing and criticizing the game.