| Unlockable: | How to unlock: |
| 1st kill (10) | Silent Assassin: A successful kill has been performed |
| 1st Kill (10) | Contracts: A successful kill has been performed |
| 1st mission complete (10) | Contracts: You completed the first mission on any level |
| 1st mission complete (10) | Silent Assassin: You completed the first mission on any difficulty level |
| 47 kills in a mission (45) | Silent Assassin: A mission has been completed with precisely 47 kills |
| 47 kills in a mission (45) | Contracts: A mission has been completed with precisely 47 kills |
| 5 Expert Silent Assassins (15) | Contracts: 5 Silent Assassin ratings awarded on Expert difficulty |
| 5 Expert Silent Assassins (15) | Silent Assassin: 5 Silent Assassin ratings awarded on the Expert difficulty |
| 5 Normal Silent Assassins (15) | Silent Assassin: 5 Silent Assassin ratings awarded on Normal difficulty |
| 5 Normal Silent Assassins (15) | Contracts: 5 Silent Assassin ratings awarded on Normal difficulty |
| 5 Professional Silent Assassins (45) | Silent Assassin: 5 Silent Assassin ratings awarded on the Professional difficulty |
| 5 Professional Silent Assassins (45) | Contracts: 5 Silent Assassin ratings awarded on Professional difficulty |
| All assault rifles collected (10) | Contracts: All assault rifles collected and displayed in the training room |
| All assault rifles collected (15) | Silent Assassin: All assault rifles collected and displayed in the Hideout |
| All firearms collected (45) | Contracts: All firearms collected and displayed in the training room |
| All firearms collected (45) | Silent Assassin: All firearms collected and displayed in the Hideout |
| All hand guns collected (10) | Contracts: All hand guns collected and displayed in the training room |
| All hand guns collected (15) | Silent Assassin: All hand guns collected and displayed in the Hideout |
| All heavy weapons collected (10) | Contracts: All heavy weapons collected and displayed in the training room |
| All heavy weapons collected (15) | Silent Assassin: All heavy weapons collected and displayed in the Hideout |
| All melee weapons collected (15) | Silent Assassin: All melee weapons collected and displayed in the Hideout |
| All melee weapons found (10) | Contracts: You have found all melee weapons |
| All shotguns collected (10) | Contracts: All shotguns collected and displayed in the training room |
| All shotguns collected (15) | Silent Assassin: All shotguns collected and displayed in the Hideout |
| All sniper rifles collected (10) | Contracts: All sniper rifles collected and displayed in the training room |
| All sniper rifles collected (15) | Silent Assassin: All sniper rifles collected and displayed in the Hideout |
| Call the caddy (45) | Silent Assassin: Killed 18 people using the golf club |
| Double Eagle (10) | Contracts: You picked up the Gold Desert Eagle Dual |
| Expert mode complete (15) | Silent Assassin: Completed expert difficulty |
| Expert Mode Complete (15) | Contracts: Completed Expert difficulty |
| Firey Fire (15) | Contracts: You used explosives on a victim |
| Floater (10) | Contracts: You drowned someone |
| Ghost Buster (45) | Contracts: You killed the ghost |
| Headshot (15) | Silent Assassin: A successful headshot has been performed |
| Headshot (15) | Contracts: A successful headshot has been performed |
| Humanist (20) | Silent Assassin: Successfully used anesthetic |
| Jack the Ripper (20) | Silent Assassin: Killed using all three knives: scalpel, kitchen and combat knife |
| Killed the wrong guy (10) | Contracts: An innocent person has been killed |
| Killed the wrong guy (10) | Silent Assassin: An innocent person has been killed |
| Minigun (10) | Contracts: You picked up the minigun |
| Normal mode complete (10) | Contracts: Completed normal difficulty |
| Normal mode complete (10) | Silent Assassin: Completed normal difficulty |
| Poisonous (15) | Contracts: You poisoned a victim |
| Professional mode complete (45) | Silent Assassin: Completed Professional difficulty |
| Professional Mode Complete (45) | Contracts: Completed professional difficulty |
| Redrum (20) | Silent Assassin: Killed using the fire axe |
| Samurai Gaijin (15) | Silent Assassin: Obtained a katana from a ninja |
| Silent Assassin (10) | Silent Assassin: A Silent Assassin rating has been awarded |
| Silent Assassin (10) | Contracts: A Silent Assassin rating has been awarded |
| Termination (45) | Contracts: You retrieved the SPAS-12 from the florist |
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