You've acquired S Rank in "The Bell-Stealing Drill".

Obtain the Elegant Suit.

Mix a drink

Complete "Exodus in America".

Kill 500 enemies.

Clear Trachea.

Clear The Root of the Tower.

Kill 500 zombies

Create a combo weapon

In an event, wreck 3 rivals by crash landing a plane.

Beat an opponent with an online form of 10 or better.

Beat a member of the development team or someone who has beaten them.