Remember those missile strikes on CI3, I would like like to adapt is as a mission type (similar on darkness mission).
Features:
Missiles spawn at a position whenever the player is facing at. On default it would be on the top side. It changes as the ship angle changes, like from anomalies.
These missiles will target the current player position where a danger zone will appear. Upon reaching the target, it will explode leaving a small AoE explosion.
Actually, since OP compared them to darkness missions, I presume that this is a modifier that’s just applied to regular waves. Not a mission consisting of one specific wave like comet chases and meteor storms.
Honestly, I think having it as a modifier is a bad idea. I feel that missiles should appear at higher difficulties in between waves, like lightning strikes, to break the flow of waves.
I made a statement loosely based on an anectodal observation and I did not expect to have to defend it. Anyway, I think the missiles shouldn’t spawn in waves where you have to stay in the middle.