Here is the full list of all 25 7th Sector achievements.
Final 3
Phantom in a brick house
Water the lawn
Robots are people too
Free a prisoner
Phantom in base C 512
Run starter
Phantom
Do not shoot!
Kill the man in the factory
Wait for the train at the factory
Destroy the first machine gun
Off the transformer after the conveyor
Another phantom in the apartment
Well, try again
Wait for TV phantom
100 deaths
TV phantom on the train
Yes, wait for phantom again !
Final 1
Final 2
Final 4
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Activate all phantoms