The player has successfully invented all possible ammo types

Fully research the Houdini Splicer

The player has fully researched the Leadhead Splicer

The player has successfully invented at least one item

The player has acquired at least one weapon upgrade

The player has taken a Research Photo of the highest grade

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

Went camping.

Regained your memories of receiving the Arisen's charge.

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