Bandai Namco Games has released two more arcade chiptune OSTs in the iTunes Store.
The first one is The Return of Ishtar, which comes with 18 tracks and has not seen a soundtrack release before, and the second one is Galaga ’88, which comes with 14 tracks.
Both games ran on similar hardware with an Yamaha YM2151 8ch FM Chip along with a custom Namco 8ch PCM playback Chip.