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