The game Dukateers belongs to the series of logic "match 3" games. You need to collect a row of three or more crystals and then they will disappear. Here your task is complicated by the fact that the game is played against the clock and you can add time only by cutting many rows. If you see that some crystal is flashing, you need to destroy it immediately - in 30 seconds it will turn into a stone, which can only be broken or blown up. The game has bonuses such as a gun, a bomb and a pickaxe. Bombs and pickaxes appear when they drop to the very bottom of the playing field, guns occasionally appear on the field themselves. A double click on the gun activates the bonus - it removes the entire row horizontally or vertically, even stones. The level is passed when the ship on the scale at the bottom of the screen goes from the left corner to the right, after that a bonus level is given in which you need to mark all identical crystals on the board in the shortest possible time.