Unlimited Mahjong Works
Publisher: SPLUSH WAVE
A mahjongg game with characters from Fate/Stay Night. You play as Shiro against a smattering of opponents, with your choice of certain characters as your partner whose powers can aid you in the matches. As with a few other mahjongg games by this company, you only get the full strip sequences of the girls by playing through to the game's Hard difficulty level, which can take a long time.
This game is available from DLsite! Follow the banner link for more info.