Unity was originally invented in Japan 1985 as “Chain Shot!” by Kuniaki Moribe. After that it has spread all over the world with names such as SameGame, TumeGame, KomeGame, MameGame, DebaGame, TileFall, Cabeem, MaciGame, GD-BMD etc.

The idea is to clear the whole playing area by removing tiles in groups. The more tiles you remove at the same time, the more points you get.