Here is the full list of all 48 Cavatus achievements.
Find the first Upgrade and let it mount in.
Master the first stage.
Master the first mission with the Airship.
Find all hidden Stars.
Complete the first time mission.
Defeat the first boss.
Defeat the second boss.
Defeat the thrid Boss.
Defeat the fourth boss.
Defeat the fifth boss.
End the game in any mode.
End the game in 'normal' mode.
End the game in 'hard' mode.
Complete a sector without any airplane damage.
Land on the airport with an empty fuel-tank.
Crash beacause you run out of fuel.
Destroy your airplane because of a crash.
Fly into an energy barriere.
Destroy your airplane while landing.
Crashed 10 times.
Destroy a turret.
Destroy a turret only with your gun.
Destroy a wall turret.
Run out of fuel with your Zeppelin.
Destroy your Zeppelin.
Complete a mission with the Zeppelin without touching anything.
Complete a mission without refuelling your airplane.
Destroy a radar station only with your gun.
Destroy two buildings simultaneously.
Destroy only the given targets, nothing else!
Destroy a flying rocket.
Destroy 20 rockets.
Destroy all mission targets only with bombs.
Destroy all mission targets only with your gun.
Destroy a ceiling turret.
Make at least 900,000 points.
Make at least 1,100,000 points.
Make at least 1,300,000 points.
Destroy 20 flying objects.
Destroy 50 fuel tanks.
Destroy 100 gas tanks.
Destroy 150 turrets.
Destroy 20 radar stations.
Destroy 50 generators.
Collect 25 fuel items.
Collect 35 repair items.
All buildings destroyed.
Collect all upgrades!