I've got the Ultracite Jetpack from the Queen - it sometimes takes a bit for it to drop.

As for the decontamination arch, did you drop the nukes yourself or are you joining other people's nukes?

The_Nerdy_Teacher

I’ve dropped it myself multiple times. Grinding every day for both. Getting exhausting.

Hmm, from my understanding, the first time you launch the nuke to complete I am become death and then complete scorched earth by killing the Queen, it should be a guaranteed drop the first time you do so.

But I know you can definitely still get it as a random drop by killing the Queen

MeisterJuice

Once you read the decon shower plan for the first time. It won't drop anymore.

I've seen people who (I believe) have learnt it and it has still dropped, it's just not a common drop.