Complete all quests in Act I.

Use a merchant to repair an item.

Kill the Skeleton King.

Complete the game on Normal

Complete Chapter 1 - 1 on any difficulty setting.

Defeat 5 enemies with the Knife.

Smelt an iron ingot.

Harvest some leather.

Construct a better pickaxe.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Use planks and sticks to make a pickaxe.

Punch a tree until the block of wood pops out.