The following article is about something that either appeared after the Birthday Bash update in FusionFall or was removed prior to the build FusionFall Retro uses, and so will not appear in FusionFall Retro. As such, it solely exists for archiving part of the original game.
Enter Foster's and convince Cheese to open the door.
Get on to the Roof of Foster's.
The launcher will definitely help you get onto the roof.
Enter Foster's interior through the roof.
Defeat 7 Fusion Cheese Puffs
Fusion Cheese Puff 0/7
Go further into the house
Oh dear! Those are even bigger! You know what you have to do!
Defeat 5 Fusion Cheese Doodles
Fusion Cheese Doodle 0/5
Oh my. That one is getting away. You should follow it immediately!
Follow the Cheese Doodle.
They're trying to take over...This will NOT do! Show that Fusion Big Cheese who's boss!
Defeat Fusion Big Cheese
Fusion Big Cheese 0/1
When not fast enough it will turn into three Big Fusion Cheese Doodles. One being adaptium, another being blastons, and the last being cosmic (at least when I did Sorted cheeses)
Health - Group
Run - Self