the 3 perks are located: kitchen floor, Shi No Numa Hut right side back corner on shelf, and in the bathroom inside the toilet water tank.

Main Easter Egg: go to garage that is closed where you will find a button on the wall interact with that and a door will open down the hall way. Pick up the battery and go to Shi No Numa hut left side and place the battery down on the table. go back to the garage where you will see a car. go up to it to buy the ending.



Side quest: Collect skulls that will reward you with a free perk or a gun. once all skulls are collected a door will open to pack a punch.