Complete Chapter 10.

Upgrade one of your cars to the maximum level.

Complete Chapter 8.

Travel at 125 mph.

Complete Chapter 5.

Get all wheels of your car into the air for at least twenty meters and then touch the ground again.

Complete Chapter 4.

Sell all the gas stamps before the time runs out.

Unlike Stucky, you enjoy incontestable health benefits. Namely, you're not dead.

You have restored power.

Gain access to Arkham Mansion after it is locked down by the Joker

Complete the game on any difficulty level.