Alternate endings
In the last mission, When the bomb is disarmed, a number of different endings can play out. To unlock each ending take the following steps below.
Note: The targets listed below are the Crouse Ship, Hisham, and Lambert.
| Unlockable: | How to Unlock: |
| Ending A: Good | NSA trust above 33%, and you managed to save at least two of the three targets. |
| Ending B: Normal | NSA trust below 33%, but you managed to save the three targets. Or destroy two of the three targets, and NSA trust above 33%. |
| Ending C: Bad | Destroy/Kill all three targets. Or Destroy/Kill two of the targets, and NSA trust below 33%. |
Elite Difficulty
The Elite difficulty is unlocked after beating the main storyline once.
Bonus equipment
Complete the following special objectives in single player mode to unlock the corresponding item.
| Unlockable: | How to Unlock: |
| Electric Lock Pick | Primary objectives in JBA HQ 1. |
| EMP Device - Enhanced | Primary objectives in JBA HQ 1. |
| EMP Grenade | Secondary objectives in the Iceland Assignment. |
| EMP Grenade - Attachment | Secondary objectives in the Cozumel Assignment. |
| Explosive Sticky Camera-Attachment | Secondary objectives in the Iceland Assignment. |
| Frag Grenade - Attachment | Primary objectives in JBA HQ 3. |
| Gas Grenade | Primary objectives in JBA HQ 1. |
| Gas Grenade - Attachment | Secondary objectives in the Cozumel Assignment. |
| Hacking Device - Force Hack Upgrade | Primary objectives in JBA HQ 2. |
| Hacking Device - Software Upgrade | Secondary objectives in the Shanghai Assignment. |
| Night Vision - Enhanced | Primary objectives in JBA HQ 3. |
| Shotgun Shell - Attachment | Secondary objectives in the Okhotsk Assignment. |
| Smoke Grenade - Attachment | Secondary objectives in the Shanghai Assignment. |
| Sonic Grenade - Attachment | Primary objectives in JBA HQ 2. |
| Ultrasonic emitter | Secondary objectives in the Ellsworth Assignment. |
| Wall Mine - Flash | Secondary objectives in the Okhotsk Assignment. |
| Wall Mine-stun | Secondary objectives in the Ellsworth Assignment. |
Tom Clancy's Splinter Cell: Double Agent 
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