A full walkthrough & guide on how to beat the final level in Splatoon 3's story mode. This is the rocket level, which is accessed after beating all 3 bosses in Alterna. The level is titled "Alterna Space". Final boss and ending are also included, as they are part of the level.

I'll start working on a 100% collectibles guide soon, as there are quite a bit of (hidden) items to find.