Kill 100 enemies with a fully charged ball shot.

Collect all 9 trading cards on Peroxis and Muxxalon.

Defeat Mux.

Visit every major Peroxian landmark (and report back to the tour guide!)

Find every scattered Muxxalon package.

Kill 50 enemies with Harpers glob shot.

Kill a Bloat with Knifey's new upgrade.

Grant the dying wish of a sick slug.

Find a way to make love to the Parasite Passenger.

Visit Cheeks and hang out until closing time.

Become the Riddle Master.

Take a bath with Toxxo.