Private Garden is an eroge released for the PC only in Japan by Tetratech. The first game was released in 1997, and its two sequels in 1998 and 2003, respectively. They are puzzle games. The player is awarded with hentai pictures after completing puzzles.
Brief Description
You have to move blocks to form a shape of a guy or girl, but be careful as if you move the blocks off the platform the game is lost.
References
Private Garden Wikipedia(Text) CC BY-SA