| Unlockable: | How to Unlock: |
| 20th Sentry | Do not get hit by a laser mine. |
| Acupuncture Is Cheaper | Kill three enemies at once with the hedgehog. |
| Chicks Dig Eyestrain | Twenty Intelligence reports. |
| Chimera Pate | Run over ten enemies with the tank in York. |
| Don't Worry, Insurance Has It Covered | Break Chimeran Box in level 30. |
| Fast Like The Tortoise | Take no damage from Slipskulls in the outskirts of London. |
| Fetch | Kill a Howler with a grenade. |
| Gasping for Air | Kill two Hybrids in a level only after severing all of their hoses. |
| Homing Beacons | Tag four Hybrids with the Bullseye. |
| I Believe This Is Yours | Use only Chimeran weapons to kill enemies in level 72. |
| I Can See My House From Here! | Jump at least 50m in the LU-P Lynx in Cheddar Gorge. |
| In 1 Ear, Out the Other | Get fuve headshots with L23Fareye in Nottingham. |
| In For a Penny | Kill three Hybrids with a single grenade. |
| Leapin' Lizards | Take no damage from Rollers in the outskirts of London. |
| Lightfoot | Take no damage from the mines in Manchester. |
| Lovely Parting Gifts | Squat over fifteen dead Hybrids. |
| Mechanical Thumbs | Complete the game under the Hard difficulty. |
| Mirror, Mirror | Destroy all glass objects in all three sections of the level. |
| Misplaced Aggression | Blow up all cars in town section of Somerset. |
| Next Speed Trap, 50 miles | Complete Somerset in less than 7:45. |
| Nowhere to Hide | Kill five enemies in a level by shooting them through a wall with the Auger. |
| Passive Aggressive | Kill four Hybrids or Menials with non-weapon damage. |
| Personal Space Bubble | Do not let any Menial grab you during level 30. |
| Reading Is Fun! | Ten Intelligence reports. |
| Supersonic Meat Cubes | Kill three Leapers with a Frag grenade. |
| Tag, You're It | Kill five enemies with the Bullseye in thirty seconds. |
| They Came From Behind | Run over three Hybrids while driving in reverse. |
| This Is My House | Do not let Chimera stand on the mining platform for more than ten seconds in Bracknell.. |
| This is My Rifle, This is My Gun | Kill the Stalker in Manchester Traffic Circle using only the M5A2. |
| Too Many Secrets | Collect all Intelligence reports. |
| Turrets | Use the Chimeran Sentry gun to kill six enemies. |
| Twirly-Whirly | Kill five Menials with Bullseye Trap. |
| We've Lost the Security Deposit Anyway | Break ten medical lamps. |
| Why Are These Candles Screaming? | Kill eight Hybrids with fire in twenty seconds.. |