The solo game Ubongo! extrem from the Brain Games series by Kosmos offers tricky puzzle fun for one person. In this logic game, players must solve 200 varied tasks in different levels of difficulty ranging from easy to hard. The colorful, hexagonal puzzle pieces must be placed on the board in a playful way so that they exactly fill the given white area. The compact puzzle game promotes logical thinking and concentration. This challenging puzzle game was developed by Grzegorz Rejchtman.