For the equivalent trophies, see BioShock 2 PS3 Trophies.

The following are unlockable achievements for BioShock 2 on the Xbox 360 and PC.

Single Player Edit

Bought a Slot Edit

5G
Bought one Plasmid Slot or Tonic Slot at a Gatherer's Garden.

Max Plasmid Slots Edit

10G
Fully upgraded to the maximum number of Plasmid Slots.
Note: The player can Achieve this Achievement before receiving Eleanor's Summon Plasmid and Plasmid slot, by purchasing plasmid slot upgrade 40,50,60 and then purchasing one 70 in Dionysus Park and the other in Fontaine Futuristics which is also 70 the last two Plasmid slot upgrades cost 70.

Upgraded a Weapon Edit

10G
Upgraded a weapon at a Power to the People Station.

Fully Upgraded a Weapon Edit

10G
Installed the third upgrade to a weapon.

All Weapon Upgrades Edit

20G
Find all 14 Power to the People weapon upgrades in the game.
Note: There aren't enough Power to the People machines to fully upgrade every single weapon in the player's arsenal.

Prolific Hacker Edit

20G
Hacked one of each kind of machine.

Master Hacker Edit

20G
Hacked 30 machines at a distance with the Hack Tool.

First Research Edit

5G
Researched a Splicer with the Research Camera.

One Research Track Edit

20G
Maxed out one Research Track.

Research Master Edit

20G
Completed all research on every subject in Rapture.
Note: Some enemies will stop appearing at certain points in the game, preventing the player from ever researching them again. It is suggested the player researches as much as possible as early as possible. Example: The Thuggish Splicer stops appearing after Delta leaves Pauper's Drop.

Grand Daddy Edit

25G
Defeated 3 Big Daddies without dying during the fight.

Master Gatherer Edit

30G
Gathered 600 ADAM with Little Sisters.
Note: This is earned over all gathers, not just currently held or all in one gathering.

Fully Upgraded a Plasmid Edit

10G
Fully upgraded one Plasmid to the Level 3 version.

All Plasmids Edit

20G
Found or purchased all 11 basic Plasmid types.

Trap Master Edit

15G
Killed 30 enemies using only Traps.

Master Protector Edit

15G
Got through a Gather with no damage and no one getting to the Little Sister.

Big Spender Edit

15G
Spent 2000 dollars at Vending Machines.

Dealt with Every Little Sister Edit

50G
Dealt with every Little Sister.

Big Brass Balls Edit

25G
Finished the game without using Vita-Chambers.

Rapture Historian Edit

40G
Found 100 Audio Diaries.
Note: There are 129 total Audio Diaries in BioShock 2. It's okay to miss 29, but still highly suggested to search everywhere for as many diaries as possible.

Against All Odds Edit

30G
Finished the game on the hardest difficulty level.

The Protector Trials DLC Edit

Litmus Test Edit

5G
Earn 6 stars in the Protector Trials

Acid Test Edit

10G
Earn 18 stars in the Protector Trial

Trial by Fire Edit

15G
Earn 36 stars in the Protector Trials

Enemy of the Family Edit

15G
Earn an A rank in all Protector Trials

Guardian Angel (Secret) Edit

10G
Complete all bonus Protector Trials.
Note: Can only be done after getting all 36 stars in Protector Trials.

Perfect Protector Edit

20G
Collect 100% of the ADAM available in a single Protector Trial

Get a Bigger Bucket Edit

25G
Collect 50% of the ADAM available in all Protector Trials

Minerva's Den DLC Edit

Garbage Collection Edit

10G	N/A
Destroy all 10 Vacuum Bots in Minerva's Den.

Lancer Killer Edit

10G	N/A
Kill a Lancer Big Daddy.

ADAM Addict Edit

10G	N/A
Resolve all the Little Sisters in Minerva's Den.

High Score (Hidden) Edit

10G	N/A
Get 9999 points in one game of Spitfire.

Login (Hidden) Edit

20G	N/A
Reach Rapture Central Computing Operations.

Root Access Granted (Hidden) Edit

20G	N/A
Reach Computer Core Access.

SUDO (Hidden) Edit

20G	N/A
Wrested control of The Thinker from Reed Wahl.

Logout (Hidden)Edit

50 G (Xbox) / 30 G (PC)	N/A
Escape Minerva's Den

Multiplayer Edit

Welcome to Rapture Edit

10G
Completed your first non-private match.

Unnatural Selection Edit

10G
Scored your first kill in a non-private match.

Disgusting Frankenstein Edit

10G
Become a Big Daddy for the first time in a non-private match.

"Mr. Bubbles-- No!" Edit

20G
Took down your first Big Daddy in a non-private match.

Two-Bit Heroics Edit

10G
Completed your first trial in a non-private match.

Mother Goose Edit

20G
Saved your first Little Sister in a non-private match.

Parasite Edit

10G
Achieved Rank 10.

Little Moth Edit

20G
Achieved Rank 20.

Skin Job Edit

20G
Achieved Rank 30.

Choose the Impossible Edit

50G
Achieved Rank 40.

Proving Grounds Edit

20G
Won your first non-private match.

Man About Town Edit

10G
Played at least one non-private match on each multiplayer map.

Rapture Metro Pack DLC Edit

Aqua Incognita Edit

25G
Play at least one non-private match on each downloadable content map.

Territorial Edit

25G
Win a non-private match in each of the 6 new maps.

Reincarnation Edit

100G
Use Rebirth to start again!
Note: The player does not need to buy the Metro Map Pack to get to level 50 in order to use rebirth.

Secret Achievements Edit

Savior Edit

25G
Saved every Little Sister and spared Grace, Stanley and Gil.

Adopted a Little Sister Edit

5G
Adopted a new Little Sister for the first time.

Counterattack Edit

5G
Kill an enemy with their own projectile.

Distance Hacker Edit

5G
Used the Hack Tool to hack an object at a distance.

Unbreakable Edit

20G
Defended yourself against a Big Sister without dying.

Look at You, Hacker Edit

15G
Killed 50 enemies using only hacked Security.

9-Irony Edit

5G
Paid your respects to the founder of Rapture.
Note: To do this, use Telekinesis to pick up the golf club behind the first mannequin of Ryan encountered in the Ryan Amusements level, then throw it at the mannequin's head for the achievement. The golf club must hit his head, not the actual body, so if the player has dismembered the mannequin beforehand, he or she would need to find the head and shoot the club at it.

Daddy's home Edit

10G
Found your way back into the ruins of Rapture.

Protector Edit

20G
Defend yourself against Lamb's assault in the train station.

Sinclair's Solution Edit

20G
Joined forces with Sinclair in Ryan Amusements.

Confronted Grace Edit

10G
Confronted Lamb's lieutenant in Pauper's Drop.

Defeated the Preacher Edit

20G
Defeated the Preacher.

Nose for News Edit

20G
Uncovered the secret of Dionysus Park.

Found Lamb's Hideout Edit

20G
Gained access to Lamb's stronghold.

Reunion Edit

50G
Reunited with your original Little Sister.

Heading to the Surface Edit

25G
Headed to the surface on the side of Sinclair's escape pod.

Escape Edit

100G
Escaped Rapture.