Kill 50 Enemies with the 92FS-9mm

Kill 100 Enemies with Headshots

Kill 30 Enemies with Mk-NDI Grenades

Defeat 20 Enemies with Hand-to-Hand Combat

Scan Gotham City to pinpoint Scarecrow's location.

Finish the Game on Normal Without Changing the Difficulty

Kill 50 Enemies with the M4

Successfully complete the first Riddler trial.

Even The Odds.

Kill 20 Enemies by Shooting from the Hip (without aiming)

Find 20 Treasures

Kill 50 Enemies with the AK-47

Kill 5 Enemies in a Row with Headshots