Monster Game Arcade

Monster Game Arcade is based off the real life game "Pachinko" from Japan. There are Monster Game Arcades located across the Maple World, but particularly Kerning City, Ludibrium, and Showa Town. To play, monster game balls must be purchased from the Cash Shop. The ball is dropped into the machine and, like a pinball machine, is launched by pulling a knob. The ball bounces around and falls through a hole, where they determine prizes by which hole it falls through. Usually the prize is more balls, but these can be exchanged for other prizes, like the Jr. Cellion hat. In JapanMS, this is the only way to acquire some of these items, making them prized possessions for those capable of earning them. In real life Japan, Pachinko Houses are very popular, and because it's somewhat related to gambling, has a somewhat shady side. There are laws against Pachinko machines giving out cash, but that doesn't stop people from finding loopholes. Some even speculate it may have connections to the Yakuza, which is why the first Pachinko area in MapleStory was located in Showa Town.

Monster Game Arcade is only available in JapanMS, TaiwanMS, and ThailandMS.
http://strategywiki.org/wiki/MapleStory/Quests/Mini-Games