Problem to unlock the "Did you have a B.L.A.S.T?" achievement

[Mashimoto]

I've already finished the game, since 2023. Last month I reinstalled to get the last missed achievements.
I completed all the missions, maps, secrets and all stuffs, but my game just don't unlocked the final achievement.
I've follow some tutorials where they say to finish again the last mission, defeating the final boss. I did this like 10x, but I keep missing this achievement.
Someone have a clue about what I need to do or what I've missing here?