Here is the full list of all 20 Shwip achievements.
Use every weapon and ability in Arcade mode.
Get 500 kills using mines
Disable 500 enemies using magnets
Kill 1000 enemies using the whip
Kill 10,000 enemies using the whip
Kill 53,594 enemies using missiles
In Minefield Mode, reach 15 checkpoints in a row without dying
Touch 5 checkpoints in Minefield Mode while maintaining max acceleration
Kill a total of 1,000,000 enemies
Just barely miss 1000 enemies.
Use the whip to eliminate a Strife with its own bullet
Die more than 30 times in a game.
Burst 1000 Boomers
Complete 500 Style tasks
Complete 3 turbo tasks at one time in Style mode.
Successfully clear 500 checkpoints in Minefield mode.
Have 3 enemies chase you in minefield
Use every weapon and ability in Style Mode.
Hit 5 mines without clearing a checkpoint in Minefield mode.
Have 3 enemies chase you in minefield.