Confronted Lamb's lieutenant in Pauper's Drop.

Maxed out one Research Track.

Researched a Splicer with the Research Camera.

Killed an enemy with its own projectile.

Defended yourself against the Big Sister without dying.

Hacked one of each kind of machine.

Adopted a new Little Sister for the very first time.

Defended yourself against Lamb's Assault in the train station.

Found your way back into the ruins of Rapture.

Complete all 40 of the Catwoman Riddler grid items

Destroy all Harley Balloons

Snap Flash an unarmed thug, an armed thug, an environmental object and a Titan

Find a way into the secret base