Sever Gaia’s hand

Discover the secret 'Hades Arm' room

Acquire the Bow of Apollo

Fully upgrade four weapons

The player has become a Big Daddy

The player has broken Fontaine's mind control

The player has entered Sander Cohen's personal quarters

The player has fully upgraded one weapon

The player has completed Sander Cohen's great masterpiece

The player has purchased every slot in one of the Plasmid or Tonic tracks

The player has restored the forests of Arcadia

The player has successfully hacked a safe