Use only the Retract for 15 non-consecutive minutes -- Booster and Air Lifter can't be active!

Collect all Backpacks

Cleared Chapter 9.

Cleared Free Mission on Hard one or more times.

Performed upgrade at the Upgrade Counter one or more times.

Cleared Chapter 6.

Got S rank 10 or more times on Easy Free Missions.

Used 10 or more One-Use Items.

Cleared Chapter 3.

Cleared Chapter 2.

Cleared Free Mission on Normal one or more times.

Obtained dropped items 10 or more times.

Cleared Free Mission on Easy one or more times.