Not-so-Silent Night is the third stage of Christmas in Space.
The stage starts off with a Pigge. Followed by Queen Elizabeth LXVI. The Pigges will continue spawning on a regular basis. Upon base hit, Satan Claus and another Queen Elizabeth LXVI will spawn. Treasures from Into the Future are recommended because of the aliens. You should have most if not all treasures before attempting this stage as they are incredibly helpful.
Start off with 2 or 3 meatshield spam then start stacking Castaway Cats (Seafarer is even better) and an anti-alien uber with range (like Aphrodite) and a cat that can block the warps from Satan Claus will help (like Catellite).