Spiral path megabattle
If you like snow and you like your combat intense, you're in the right place. The 'spiral path megabattle' is something you can set up in level 5 ('Assault on the Control Room'), in the place where you meet up with a group of Marines that get attacked by Hunters. By getting a mass of enemies chasing after you from previous areas, you end up facing a big angry mob here; potentially around 60 on Legendary, and around 50 on the other difficulty levels. The confined area may not permit the same range of tactical possibilities as the rockslide megabattle, and it's not as straightforward to set up, but on the other hand you've got rocket launchers and the unique opportunity of setting up blockades, and the fighting is every bit as intense. So don't miss it!
The first page covers setting up, including how to arrange a blockade. The second gives some basic battle plans to try, whilst the third goes into detail on the blockade theme. The final two pages concern making the enemy attack or collect in one big mass, for intensified battles or mischief.