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