Here is the full list of all 9 Gravity Error achievements.
Collect all Orbs in Chapter 5.
Collect all Orbs in the game.
Collect all Orbs in Chapter 4.
Create a gravitational loop.
Die 25 times in one level.
Collect all Orbs in Chapter 3.
Collect all Orbs in Chapter 2.
Collect all Orbs in Chapter 1.
Finish a level without necessarily using all gravity shifters.