Nurikabe is probably unknown to most of you (and us).
Nurikabe by Breakpoint Games features: It's kind of Minesweeper in reverse and also goes by another name, Islands in the Stream.
The idea behind Nurikabe is simple; the game starts with a square grid that has certain cells filled with numbers. Don't worry, you don't have to get the calculator out or start looking for vertical and horizontal patterns. You have to colour in the remaining cells either blue (visualise streams if you will) or white (think islands). There are certain rules to follow and this is where the numbers come in. The numbers are always white and if it is a number 2, it means this island is formed from 2 cells.