1943 Kai: Midway Kaisen

This updated version was released exactly one year after the original game's debut. 1943 Kai is an improved, "wild" version of 1943 that was only available in Japan under the name 1943 Kai: Midway Kaisen (or 1943改: ミッドウェイ海戦). Most of the graphics and sounds were reworked, the weapons were made more extreme, and some pretty weird things (laser-firing WWII planes and ships running on the ground) were added. The trademark P-38 was replaced by a biplane, the Boeing Stearman Model 75.