Restore your first memory chip.

Make your first donation of weapons, equipment, etc.

Change footwear for the first time.

Complete your first structure (signs, ladders, and climbing anchors also count.)

Use the music player for the first time.

Soothe a crying BB and stop the crying for the first time.

Complete the prologue: Porter.

Get all the trophies

Complete 40 levels

Complete 35 levels

Find the third secret area

Complete 20 levels

Find the second secret area