| Unlockable | How to unlock |
|---|
| Engineer of Goo I (10) | All OCD Flags in Chapter 1 |
| Engineer of Goo II (10) | All OCD Flags in Chapter 2 |
| Engineer of Goo III (20) | All OCD Flags in Chapter 3 |
| Engineer of Goo IV (20) | All OCD Flags in Chapter 4 |
| Engineer of Goo V (20) | All OCD Flags in Chapter 5 |
| The Architect of Goo (100) | All OCD Flags |
| Vice President of Goo Product (10) | All Levels Complete |
| Subversive Traveler (10) | There is a secret |
