Speaking of arcade mahjong, Ryuusei Jyanshi Kirara Star is the most rigged mahjong game in existence. The further you get, the "difficulty" goes up, and by "difficulty" I mean the rigging mechanism that exists only to frustrate the player. Pretty much any discard later on causes you to draw a neighboring (or the same) tile. I only beat some stages after figuring out how this works and tricking the game into giving me the tiles I needed. I wonder if it's even possible to 1cc this thing without save states and RNG manipulation.