Singleplayer only: Conquer all Areas leading up to the Boss in Jellywood Glade without moving Player 1 and without Player 1 dying. Your Ally is allowed to move freely. You are allowed to move in Area 0 and whenever an Area is completed. You are also allowed to move for the first 2 seconds inside a new Area (to give a buffer when first entering the Area where you may move accidentally).
Take every Difficult path at the start of every Zone in a single conquest. This is the right-side path when first entering a new Zone. You may choose either path beyond that.
Defeat The Slime Queen without taking any damage from the boss fight (you are allowed to take damage leading up to this boss fight). Barrier is ignored. If you get hit while Barrier is active, this still fails the achievement.
Defeat Frost Phoenix without taking any damage from the boss fight (you are allowed to take damage leading up to this boss fight). Barrier is ignored. If you get hit while Barrier is active, this still fails the achievement.