Here is the full list of all 14 Long Sky achievements.
Earn 1,00 points in a single round
Earn 2,00 points in a single round
Earn 5,00 points in a single round
Earn 1,200 points in a single round
Earn 2,000 points in a single round
Earn 3,000 points in a single round
Earn 4,000 points in a single round
Unlock the special effects badge "青"
Unlock the special effects badge "白"
Unlock the special effects badge "朱"
Unlock the special effects badge "玄"
Unlock the special effects badge "秦"
Unlock the spaceship "红龙"
Unlock the spaceship "黑旋风"