Here is the full list of all 12 Porradaria Upgrade achievements.
Get a Potato Chips.
Pass right through an enemy with the Bushin no Jutsu.
Find the shortcut to the Mountain Level.
Kill a enemy dove.
Find the underground cave in the Desert Level.
Finish the Game.
Finish the game with the Ninja with all the Potato Chips.
Finish the game with the Swordsman with all the Potato Chips.
Complete the MonsterDex.
Finish the game with the Ninja without using any Sub-Weapons neither the Bushin no Jutsu.
Pass right through the narrow spiky corridor in the Mountain Level (alive).
See all the endings.