Obtain a key by completing the second Riddler trial.

Escape from ACE Chemicals.

Scan Gotham City to pinpoint Scarecrow's location.

Komplete 50% of Story Mode

Completed "Bon Appétit"

Completed "Visiting Rich People"

Found a copy of Gangsters Monthly

Completed "The Saint and the Sinner"

Completed "Sarah"

Won the race

Found a Pulp Magazine

Found a 'Gangsters of the United States' cigarette card