zen games includes two variants of famous puzzle games:
Hexajong is a Mahjong variant which main innovation is that the stones are hexagons instead of squares. The player still needs to find two open stones with the same symbols to remove them. The goal is to remove all stones from the game board.
Ishidoku is a Sudoku variant with figurines instead of numbers. The player needs to fill these figurines in grids without using a figurine type twice in a row, column or grid area.
Both games feature puzzles with increasing difficulty which can be played in a linear fashion or randomly generated boards and help functions.