Use your Eagle Vision to scan a Glyph in the environment.

Perform a Leap of Faith from the Top of Florence's Giotto's Campanile.

Enter the Animus 2.0.

Be reborn as Ezio Auditore Da Firenze.

Trigger a Pillager Raid.

Construct a Nether Portal.

Harvest some leather.

Acquire diamonds with your iron tools.

Smelt wood trunks using charcoal to make more charcoal.

Smelt an iron ingot.

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

Use planks and sticks to make a sword.