Complete the game on the hardest difficulty setting.
Unlocked: 10 Mar 2009 19:13:37
Complete the game without harvesting any Little Sisters.
Unlocked: 08 Mar 2009 14:42:58
The player has defeated Atlas
Unlocked: 08 Mar 2009 14:42:23
Historian
50Find every audio diary.
Unlocked: 08 Mar 2009 14:31:41
Acquire all upgrades for all weapons.
Unlocked: 08 Mar 2009 14:04:21
Fully upgrade five weapons.
Unlocked: 08 Mar 2009 11:20:35
The player has become a Big Daddy.
Unlocked: 08 Mar 2009 11:16:09
Either Harvest or Rescue every Little Sister in the game
Unlocked: 08 Mar 2009 11:08:43
Successfully invent at least 100 items.
Unlocked: 08 Mar 2009 10:58:36
Collect or Invent 53 Tonics in the Physical, Engineering and Combat tracks.
Unlocked: 08 Mar 2009 10:54:14
The player has broken Fontaine's mind control
Unlocked: 08 Mar 2009 00:28:21
Fully upgrade four weapons.
Unlocked: 07 Mar 2009 23:47:37
Purchased every slot in all four Plasmid and Tonic tracks
Unlocked: 07 Mar 2009 23:31:32
The player has entered Sander Cohen's personal quarters.
Unlocked: 07 Mar 2009 23:22:28
Fully upgrade three weapons.
Unlocked: 07 Mar 2009 23:19:22
Fully research the Rosie.
Unlocked: 07 Mar 2009 23:08:16
Research PhD
20Max out all possible research.
Unlocked: 07 Mar 2009 23:08:16
Fully research the Little Sister.
Unlocked: 07 Mar 2009 23:08:08
The player has defeated Andrew Ryan
Unlocked: 07 Mar 2009 22:01:37
Fully research the Bouncer.
Unlocked: 07 Mar 2009 21:03:11
Fully upgrade two weapons.
Unlocked: 07 Mar 2009 20:55:54
Successfully invented all possible ammo types.
Unlocked: 07 Mar 2009 20:31:55
Fully research the Nitro Splicer.
Unlocked: 07 Mar 2009 19:53:19
The player has taken a picture of Sander Cohen's corpse
Unlocked: 07 Mar 2009 19:43:03
The player has completed Sander Cohen's great masterpiece
Unlocked: 07 Mar 2009 19:24:23
Take at least one photo in every research group.
Unlocked: 07 Mar 2009 18:24:35
Fully research the Spider Splicer.
Unlocked: 07 Mar 2009 17:43:06
Lucky Winner
10Hit the jackpot at a slot machine
Unlocked: 07 Mar 2009 17:39:51
The player has restored the forests of Arcadia
Unlocked: 07 Mar 2009 17:10:12
Purchased every slot in one of the Plasmid or Tonic tracks
Unlocked: 07 Mar 2009 16:44:10
Fully research the Houdini Splicer.
Unlocked: 07 Mar 2009 16:22:52
Fully upgrade one weapon.
Unlocked: 07 Mar 2009 15:03:56
Fully research the Thuggish Splicer.
Unlocked: 07 Mar 2009 14:40:47
Successfully invent at least one item.
Unlocked: 07 Mar 2009 14:24:08
Acquire at least one weapon upgrade.
Unlocked: 07 Mar 2009 13:31:58
The player has defeated Peach Wilkins
Unlocked: 07 Mar 2009 13:24:15
Fully research the Leadhead Splicer.
Unlocked: 07 Mar 2009 12:56:37
Successfully complete 50 hacks.
Unlocked: 07 Mar 2009 12:54:21
Take at least one Research Photo of a Splicer.
Unlocked: 07 Mar 2009 12:24:36
Take a Research Photo of the highest grade.
Unlocked: 07 Mar 2009 12:24:24
Purchase one slot in any Plasmid or Tonic track
Unlocked: 07 Mar 2009 00:11:19
The player has defeated the crazed Dr. Steinman
Unlocked: 05 Jan 2009 21:57:57
Successfully hack a safe.
Unlocked: 05 Jan 2009 21:25:27
Successfully hack a security camera.
Unlocked: 05 Jan 2009 20:57:46
Successfully hack a turret.
Unlocked: 05 Jan 2009 20:41:33
Successfully hack a vending machine.
Unlocked: 05 Jan 2009 20:30:47
Perform at least one successful hack.
Unlocked: 05 Jan 2009 20:26:20
Successfully hack a security bot.
Unlocked: 05 Jan 2009 20:26:20
Successfully complete the Welcome To Rapture Level.
Unlocked: 05 Jan 2009 20:23:35
Shock an enemy in the water.
Unlocked: 05 Jan 2009 20:16:03
Complete the game on Hard difficulty without using a Vita-Chamber
Unlocked: 10 Mar 2009 19:13:38