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