Avatar Awards
| Unlockable | How to Unlock |
|---|---|
| Big Science Dress (Female) | Complete the multiplayer campaign. |
| Big Science T-Shirt (Male) | Complete the multiplayer campaign. |
| Splosion Man Sweatshirt (Female) | Break any glass in the game. |
| Splosion man Tee shirt (for your avatar) | Break any glass in the game (after 8/11/09) |
Achievements
| Unlockable | How to Unlock |
|---|---|
| A Little Help from Your Friends (25) | Complete the Multiplayer game. |
| All Hail The Splode King (25) | Complete the Single Player game in Hardcore mode. |
| Eventual Destruction of a Galaxy (10) | Be on the lookout for an old friend. |
| Get Over Yourselves (10) | Select "Credits" from the "Help & Options" menu and watch the whole thing. |
| Get Them Out of Our Schools (10) | Eliminate 10 Scientists and stop them from spreading their filthy lies. |
| Lay Off the Caffeine (10) | Splode 300 times in one stage. |
| Master of Controls (10) | Attempt to edit your controls in the options menu. |
| Not a Portal Reference (25) | Collect all 47 cakes in Single Player mode. |
| Omaha Steaks?, Delicious! (15) | Create 5,000 filets. |
| Only Gandhi Would Be Proud (10) | Finish a stage without killing any scientists. |
| Sugar High (25) | Collect all 47 cakes in Multiplayer mode. |
| You're the Best Around! (25) | Complete the Single Player game. |
Unlock Coward's Way Out
To receive this feature which allows you to skip levels, simply kill yourself over and over by holding right trigger until it unlocks.
Unlockable Extras
| Unlockable | How to Unlock |
|---|---|
| 'Splosion Man Gamer Pic | Beat Single Level 1-4 |
| 'Splosion Man Premium Theme | Beat Single Level 3-18 |
| Scientist Gamer Pic | Beat Multiplayer Level 1-4 |
