Defeated the Preacher.

Killed an enemy with its own projectile.

Defeated 3 Big Daddies without dying during the fight.

Researched a Splicer with the Research Camera.

Defended yourself against the Big Sister without dying.

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.

The player has successfully hacked a security camera

The player has fully upgraded three weapons

The player has successfully invented all possible ammo types

The player has fully upgraded two weapons

The player has fully upgraded one weapon