Cosmic Star Heroine
34 Achievements
10-12h
Cosmic Star
Complete the game.
53.0%
How to unlock the Cosmic Star achievement in Cosmic Star Heroine - Definitive Guide
Story related and cannot be missed
The final level of the game takes place on an alien spaceship. It is a pretty short level but longer than most others you have come across, and you will not find it very challenging to get through at this point.
To beat the level, you have to complete four boss fights in a row. The first boss fight takes place against Echo and is pretty standard. The remaining three are against the Lumina device itself.
The first fight with the Lumina Device is simple and straight forward. Attack the only part you can until you drain it of its HP.
The second fight grants the Lumina Device three attachable points, two guns and a head unit. For this fight, I would cast a song to damage all three parts each round then focus on each of the guns and finally the head unit.
The third fight once again sees the Lumina Device granted 3 points to attack, two tank like monsters and a third head unit. This time round, cast a song to cause damage each round but only focus on the head unit. When it dies, so do the two support mobs.
After this fight the trophy will pop, and so will the . You do not need to watch the end or the credits, but you can if you like.