Here is the full list of all 17 Cerberus: Orbital watch achievements.
Kill 5 enemies
Kill 10 enemies
Kill 50 enemies
Kill 100 enemies
Kill 500 enemies
Kill 1000 enemies
Destroy Sputnik-1 satelite
Contact allien civilization
Destroy allien dreadnought
Make 500 shots with light gun
Make 1000 shots with light gun
Make 5000 shots with light gun
Earn 500 xp
Earn 3000 xp
Earn 10000 xp
Make all 4 ships avaible at the same time
All 4 ships destroyed