Impressive C219 Music (Arcade)
Used in both the Namco NA-1 and Namco NA-2 systems (the former are described as using "C140 (integrated into the "219" custom)" on wikipedia).
There is also a noise generator (used in Fighter & Attacker and X-Day 2) and support for the same mulaw sound format as the C352 (used in Knuckle Heads), though this latter feature is missing from MAME and VGMPlay, so use QuattroPlay instead when listening to such OSTs.
Knuckle Heads (ARC, C219)
X-Day 2 (ARC, C219)
X-Day/Life Expectancy Search Service X-Day (ARC, C219)
Fighter & Attacker/"F/A" (ARC, C219) - NA-1
Emeraldia (ARC, C219) - Same as NA-1 ver.?
Numan Athletics (ARC, C219)
Exvania (ARC, C219) - NA-1
Bakuretsu Quiz Ma-Q Dai Bouken (ARC, C219)(in-game) - NA-1
Cosmo Gang the Puzzle (ARC, C219)(in-game) - NA-1
Tinkle Pit (ARC, C219)(in-game) - NA-1
Nettou! Gekitou! Quiztou!!/Quiz Island (ARC, C219)(in-game) - NA-1
Super World Court (ARC, C219)(in-game) - NA-1,
There is also a noise generator (used in Fighter & Attacker and X-Day 2) and support for the same mulaw sound format as the C352 (used in Knuckle Heads), though this latter feature is missing from MAME and VGMPlay, so use QuattroPlay instead when listening to such OSTs.
Knuckle Heads (ARC, C219)
X-Day 2 (ARC, C219)
X-Day/Life Expectancy Search Service X-Day (ARC, C219)
Fighter & Attacker/"F/A" (ARC, C219) - NA-1
Emeraldia (ARC, C219) - Same as NA-1 ver.?
Numan Athletics (ARC, C219)
Exvania (ARC, C219) - NA-1
Bakuretsu Quiz Ma-Q Dai Bouken (ARC, C219)(in-game) - NA-1
Cosmo Gang the Puzzle (ARC, C219)(in-game) - NA-1
Tinkle Pit (ARC, C219)(in-game) - NA-1
Nettou! Gekitou! Quiztou!!/Quiz Island (ARC, C219)(in-game) - NA-1
Super World Court (ARC, C219)(in-game) - NA-1,