| Unlockable: | How to Unlock: |
| The Alien hat | Collect the special item crate in level 2-1 and then beat the level. |
| The Astronaut hat | Collect the special item crate in level 1-1 and then beat the level. |
| The Babe speech-bank | Collect the special item crate in level 4-3 and then beat the level. |
| The Bolt flag | Collect the special item crate in level 6-4 and then beat the level. |
| The Captain speech-bank | Collect the special item crate in level 2-3 and then beat the level. |
| The Column gravestone | Collect the special item crate in level 6-5 and then beat the level. |
| The Creepy speech-bank | Collect the special item crate in level 1-3 and then beat the level. |
| The Cross gravestone | Collect the special item crate in level 6-2 and then beat the level. |
| The Crush flag | Collect the special item crate in level 4-4 and then beat the level. |
| The Digital gravestone | Collect the special item crate in level 4-2 and then beat the level. |
| The Doctor speech-bank | Collect the special item crate in level 3-3 and then beat the level. |
| The Eyeball hat | Collect the special item crate in level 1-5 and then beat the level. |
| The Female Computer speech-bank | Collect the special item crate in level 5-3 and then beat the level. |
| The Helmet hat | Collect the special item crate in level 3-1 and then beat the level. |
| The Insignia flag | Collect the special item crate in level 1-4 and then beat the level. |
| The Logical speech-bank | Collect the special item crate in level 2-5 and then beat the level. |
| The Meteor flag | Collect the special item crate in level 3-4 and then beat the level. |
| The Obelisk gravestone | Collect the special item crate in level 3-2 and then beat the level. |
| The Padded Hat | Collect the special item crate in level 4-1 and then beat the level. |
| The Petrified gravestone | Collect the special item crate in level 4-5 and then beat the level. |
| The Post gravestone | Collect the special item crate in level 2-2 and then beat the level. |
| The Princess speech-bank | Collect the special item crate in level 6-3 and then beat the level. |
| The R.I.P. gravestone | Collect the special item crate in level 1-2 and then beat the level. |
| The Red hat | Collect the special item crate in level 5-1 and then beat the level. |
| The Slab gravestone | Collect the special item crate in level 5-2 and then beat the level. |
| The Strong Worm flag | Collect the special item crate in level 2-4 and then beat the level. |
| The Tentacle flag | Collect the special item crate in level 5-4 and then beat the level. |
| The Visor hat | Collect the special item crate in level 5-6 and then beat the level. |
| The Yellow hat | Collect the special item crate in level 6-1 and then beat the level. |
| The Zap flag | Collect the special item crate in level 3-5 and then beat the level. |