KBlocks is described as 'The idea is to stack the falling blocks to create horizontal lines without any gaps. When a line is completed it is removed, and more space is available in the play area. When there is not enough space for blocks to fall, the game is over' and is an app. There are more than 25 alternatives to KBlocks for a variety of platforms, including Android, Windows, iPhone, Web-based and Linux apps. The best KBlocks alternative is Tetris, which is free. Other great apps like KBlocks are Hextris, TETR.IO, OpenBlok and Quadrapassel.