Navigate to the Unblocked Games WTF webpage in your browser. 2. In the search section, type Fortnite Building. 3. Click on the "Click to play now" option. 4. Allow the game to load before pressing the Play button. I had like to point out that it's not the original Fortnite video game, but rather an HTML version of that as well. "If a hidden designer is residing with your own life then enjoy the Fortnite Building unblocked game because we can construct it with no limitations," the site says of the Fortnite Building.