Welcome to King of Stackers, a turn-based strategy game in which you must stack blocks in neat rows. Doing so fills your opponent's field with random blocks, making it harder for them to arrange their blocks. Twisting blocks into tight spaces, or stacking a lot of rows at once, will put your opponent in greater jeopardy.

A comprehensive (but now slightly-out-of-date) description of the game and basic strategies can be found here. Please refer to the Changelog for the most up-to-date information.

Some notes for players:

Thanks are due to the members of Hard Drop for their support, and to Blink for giving us the nifty shortcut URL http://www.harddrop.com/kos.