Block an enemy attack by guarding.

Obtain something by closely examining an item.

Collect one attachment of every type on a single character.

Collect 40 weapon colors on a single character.

Collect 20 emotes on a single character.

As the Predator, kill the entire Fireteam before they complete their main mission

Wound a Predator so it leaves a green blood trail

Equip three attachments on a single weapon.

Finish the "Priority One" Campaign.

You've spent $500.

You defeated Princess Kenny and recovered the Stick of Truth.

You defeated 3 enemies in one battle while your buddy was knocked out.