Pachinko (パチンコ) is an SG-1000 game developed and published by Sega in 1983. It is, as the name suggests, a video game version of Pachinko, a popular game in Japan. The game did not see an international release.
Pachinko is an extremely rare game for the SG-1000. Soon after release, it was recalled from sale due to a game-breaking bug and very few copies remain in the hands of collectors.
As of 2013, a recent auction of the game on Yahoo Japan was won for ¥113,500, but it has been known to sell upwards from ¥200,000.
The bug was fixed and the game was re-released a few weeks later as a "sequel", Pachinko II, which is much more common.