Complete the game without harvesting any Little Sisters.

Unlocked: 05 Feb 2010 13:33:04

The player has defeated Atlas

Unlocked: 05 Feb 2010 13:32:29

The player has become a Big Daddy.

Unlocked: 05 Feb 2010 12:36:54

Successfully invent at least 100 items.

Unlocked: 04 Feb 2010 12:47:09

Either Harvest or Rescue every Little Sister in the game

Unlocked: 04 Feb 2010 12:22:21

Acquire all upgrades for all weapons.

Unlocked: 04 Feb 2010 12:14:49

Take at least one photo in every research group.

Unlocked: 04 Feb 2010 11:49:34

Fully upgrade five weapons.

Unlocked: 04 Feb 2010 11:22:58

Purchased every slot in all four Plasmid and Tonic tracks

Unlocked: 03 Feb 2010 14:03:22

The player has broken Fontaine's mind control

Unlocked: 01 Feb 2010 13:05:15

Fully research the Little Sister.

Unlocked: 01 Feb 2010 12:41:27

Fully research the Nitro Splicer.

Unlocked: 01 Feb 2010 12:00:41

The player has entered Sander Cohen's personal quarters.

Unlocked: 31 Jan 2010 13:20:18

Fully upgrade four weapons.

Unlocked: 31 Jan 2010 13:15:37

Fully upgrade three weapons.

Unlocked: 31 Jan 2010 02:08:38

Fully research the Bouncer.

Unlocked: 30 Jan 2010 08:51:15

The player has completed Sander Cohen's great masterpiece

Unlocked: 30 Jan 2010 08:08:52

Fully upgrade two weapons.

Unlocked: 30 Jan 2010 01:02:39

Fully research the Spider Splicer.

Unlocked: 29 Jan 2010 23:42:25

Fully research the Houdini Splicer.

Unlocked: 28 Jan 2010 12:48:42

Successfully invented all possible ammo types.

Unlocked: 28 Jan 2010 12:27:46

The player has restored the forests of Arcadia

Unlocked: 28 Jan 2010 12:17:23

Fully research the Leadhead Splicer.

Unlocked: 27 Jan 2010 14:08:21

Fully research the Thuggish Splicer.

Unlocked: 27 Jan 2010 14:07:32

Purchased every slot in one of the Plasmid or Tonic tracks

Unlocked: 27 Jan 2010 13:47:01

Fully research the Rosie.

Unlocked: 24 Jan 2010 09:03:09

Fully upgrade one weapon.

Unlocked: 24 Jan 2010 07:24:44

Successfully invent at least one item.

Unlocked: 24 Jan 2010 02:51:21

Acquire at least one weapon upgrade.

Unlocked: 23 Jan 2010 11:35:21

The player has defeated Peach Wilkins

Unlocked: 23 Jan 2010 11:16:57

Successfully complete 50 hacks.

Unlocked: 23 Jan 2010 10:17:52

Take at least one Research Photo of a Splicer.

Unlocked: 23 Jan 2010 09:56:00

Take a Research Photo of the highest grade.

Unlocked: 23 Jan 2010 09:55:51

Purchase one slot in any Plasmid or Tonic track

Unlocked: 23 Jan 2010 09:12:15

The player has defeated the crazed Dr. Steinman

Unlocked: 23 Jan 2010 07:27:50

Successfully hack a safe.

Unlocked: 23 Jan 2010 06:33:22

Successfully hack a security camera.

Unlocked: 23 Jan 2010 06:12:07

Successfully hack a turret.

Unlocked: 23 Jan 2010 03:26:53

Successfully hack a vending machine.

Unlocked: 23 Jan 2010 03:20:02

Perform at least one successful hack.

Unlocked: 23 Jan 2010 03:09:43

Successfully hack a security bot.

Unlocked: 23 Jan 2010 03:09:43

Successfully complete the Welcome To Rapture Level.

Unlocked: 14 Jan 2010 12:13:57

Shock an enemy in the water.

Unlocked: 14 Jan 2010 11:57:45

The player has defeated Andrew Ryan

Unlocked: Offline

Max out all possible research.

Collect or Invent 53 Tonics in the Physical, Engineering and Combat tracks.

Find every audio diary.

Complete the game on the hardest difficulty setting.

Hit the jackpot at a slot machine

The player has taken a picture of Sander Cohen's corpse