Complete DNA Sequence 1.

Defeat ten enemies using hand-to-hand combat on the back of the convoy trucks

Defeat 20 enemies by shooting from the hip (without aiming with L1/R1)

Throw back a grenade and defeat two enemies at once

Defeat 50 enemies with stealth attacks

Don't look down

Collect all of Batman's gadgets and upgrades

Defeat 100 enemies with headshots

Find the Strange Relic

Defeat 30 enemies with the Arm Micro

Finish the game in Normal Mode

Defeat 30 enemies with the Tau Sniper

Defeat 30 enemies with the G-MAL