Hentai Tetronimo is a puzzle-arcade game in which the player drops tetrominos (shapes composed of 4 squares) into a grid, attempting to form complete rows. When a row is completed, it is removed and the player's score is increased. Completing a level reveals an adult image.

Hentai Tetromino puzzle arcade game in which the goal is to drop tetromino pieces onto a grid, completing rows.  Completing a row removes the row and increases your score.As rows are completed, an adult image is gradually revealed.  When the player achieves the target score, the entire adult image is revealedPuzzles may be completed in any order.  Difficulty can be adjusted, increasing or decreasing the speed at which tetrominoes fall. Completed puzzles may be re-played or viewed in their completed state. Gallery included.

Good Game Database

Hentai Tetromino Achievements