Sky Fighter

To obtain the highest degree, you need to get all the medals, therefore, in addition to completing the main tasks, you must also complete all the secondary and secret tasks (one minor and one secret in each level). And if secondary tasks are written right away (and their failure to complete them also comes out right away), then you learn about secret ones only at the end of the level in the form of a hint. Here is a list of secret missions:

1. Destroy the enemy camp
2. Destroy at least 14 enemy fighters
3. Destroy all enemy ground vehicles (tanks, trucks, armored personnel carriers, etc.)
4. Destroy all enemy bombers
5. Destroy all enemy ground vehicles
6. Destroy ALL enemy planes (if the plane gave an SOS signal and you let it escape, the mission will fail)
7. Destroy all enemy anti-aircraft guns
8. Destroy all enemy anti-aircraft guns
9. Destroy all enemy tanks
10. Destroy all enemy bunkers
11. Destroy all enemy ground vehicles
12. Destroy all flood platforms (they must not just be blown up, but go to the bottom)
13. Destroy all naval forces
14. Destroy all naval forces
15. Do not detonate a single mine in a minefield
16. Protect ALL hospitals
17. Destroy all ground forces
18. Destroy all enemy balloons
19. Destroy all enemy ground vehicles
20. Do not detonate a single mine in a minefield
21. Destroy all enemy ground vehicles