There are 36 humans in this level; this means that the game is over if the Mutant Strains get 7 or more humans.
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 Washington D.C. Levels
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| The Mall | |||||||||||||
| 1 | Introduction | 2 | Lower Mall | 3 | Sports Store | 4 | Supermarket | 5 | Upper Mall | 6 | The Cinema | 7 | Bonus Level |
| Power Plant | |||||||||||||
| 1 | Power Plant | 2 | Main Reactor | 3 | Nuclear Waste Zone | 4 | Lower Offices | 5 | Backup Generator | 6 | Laboratory | 7 | Bonus Level |
| Police Precinct | |||||||||||||
| 1 | Police Precinct | 2 | Archives | 3 | Holding Cells | 4 | Cafeteria | 5 | Fifth Floor | 6 | Jailbreak | 7 | Bonus Level |
| White House | |||||||||||||
| 1 | The White House | 2 | Press Conference | 3 | Ballroom | 4 | Rose Garden | 5 | Situation Room | 6 | The West Wing | 7 | The End |
 London Levels
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Terminal 5 | |||||||||||||
| 1 | Touchdown | 2 | Baggage Claim | 3 | Ground Crew | 4 | Immigration | 5 | Duty Free Mauling | 6 | Arrivals | 7 | Bonus Level |
| Countryside | |||||||||||||
| 1 | Into the Woods | 2 | Scout Camp | 3 | Riverside | 4 | Hunting Ground | 5 | Cornfields | 6 | The Farm | 7 | Bonus Level |
| The Labs | |||||||||||||
| 1 | Lab Entrance | 2 | Lab Offices | 3 | Databanks | 4 | Test Chamber | 5 | Containment Cells | 6 | Security Control | 7 | Bonus Level |
| The Palace | |||||||||||||
| 1 | Main Gate | 2 | Hallways | 3 | Panic Room | 4 | Royal Ballroom | 5 | Servant Quarters | 6 | Throne Room | 7 | The End |