Here is the full list of all 17 KAMUI achievements.
Score Over 20,000,000
1 Credit Cleared
Score Over 10,000,000
Shoot down 10,000 enemies
Score Over 5,000,000
Mass Production Model Available
Mission Complete
ZAFFIQUEL Defeated
NOUSU(NEURAL NEST) Defeated
SCORPIO Defeated
GUARDIAN SOLDIER Defeated
KAMUI #0(Modified) Defeated
Shoot down 1,000 enemies
OUGUMO Defeated
KOKUTAKA Defeated
SOURYUU Defeated
Shoot down 100 enemies