Here is the full list of all 30 Eastward achievements.
Upgrade all weapons to their max levels.
Open all the treasure boxes in the game.
Eat every food item in the game.
Complete the game.
Reach max hearts.
Complete Chapter 7.
Complete the true ending in Earth Born.
Collect every single Pixball.
Collect at least 1 of every type of Pixball.
Collect every ingredient in the game.
Upgrade your backpack to its maximum capacity.
Collect every recipe in the game.
Try all five jobs with John.
Complete Chapter 6.
Complete Chapter 5.
Upgrade your bomb and ammo boxes to their maximum capacities.
Complete Chapter 4.
Complete Chapter 3.
Obtain a "heart" from the people of New Dam City.
Obtain 1,000 salt from off a Salt Bug.
Defeat the Demon King in Earth Born.
Interact with 100 different NPCs.
Learn all of Sam's abilities.
Interact with 50 different NPCs.
Complete Chapter 2.
Complete Chapter 1.
Defeat an enemy using clutter from off the ground.
Defeat an enemy while it's being controlled by Sam.
Cook your first dish.
Obtain a Pixball.