Here is the full list of all 8 Shooting Game KARI achievements.
First time starting the game.
All stages on EASY difficulty have been cleared.
All stages on NORMAL difficulty have been cleared.
All stages on HARD difficulty have been cleared.
Defeated a stage boss for the first time.
Clear without taking damage (any difficulty level)
Defeated an extra boss on NORMAL difficulty.
Defeated an extra boss on HARD difficulty.