The player has successfully invented at least one item

The player has defeated Peach Wilkins

The player has purchased one slot in any Plasmid or Tonic track

The player has defeated the crazed Dr. Steinman

The player has successfully hacked a security camera

The player has performed at least one successful hack

The player has successfully completed the Welcome To Rapture Level

Collect all of Batman's gadgets and upgrades

Complete all augmented reality training exercises

Reunite the separated couple

Stop the phone booth killer

Collect enough evidence to locate the gun for hire

Rescue the first hostage from Riddler