NBA 2K13's newest feature, Signature Skills, ranks certain players with particular skills based on their real-life output. Some players are big dunkers, while others are floor generals, while some defend the paint like their lives depend on it. These skills are carried over into NBA 2K13 to help offer the most realistic "simulation" experience possible.
Here's a full summary of each skill set.
Posterizer
What Happens
A "Posterizer" is a player that will look to dunk on defenders when in traffic. This skill only activates when a defender is within the vacinity of the driving player.
Requires
Stamina must be above 80.
Effect
Once the dunk is completed, teammates will be given a temporary energy boost.
Example Players
Blake Griffin, Josh Smith
Highlight Film

What Happens
Players with this skill will always attempt the most explosive, spectacular dunk in their dunking repertoire.
Requires
Stamina must be above 80.
Effect
Once the dunk is completed, teammates will be given a temporary energy boost.
Example Players
JaVale McGee, Gerald Green
Finisher

What Happens
Players are more likely to finish contact layups and dunks are a higher rate than other players.
Requires
N/A
Effect
Finishers have a decreased shot penalty rating with contact of 30%, making and-one opportunities with these players more likely.
Example Players
Rudy Gay, Carmelo Anthony
Acrobat

What Happens
A player can change their shot mid-air without severely altering the chances of making it.
Requires
N/A
Effect
Acrobat players receive a 40% decrease in shot penalty when changing a shot mid-air. There is also a 15% boost in shot chance.
Example Players
Derrick Rose, Tony Parker
Shot Up Shooter

What Happens
This player can shoot long-range shots from a stand-still position.
Requires
Player must be standing still, must be shooting from 12 to 28 feet away from the basket, and not posting up or dribbling.
Effect
30% decrease in shot penalty for releasing the shot too early or too late.
Example Players
Kyle Korver
Shot Creator

What Happens
This type of player has a higher chance of making a shot than most other players, IF he creates space for himself.
Requires
The player must break his defender down to create space, which must be bigger than the space between him and the defender when the break started.
The shot creator must be within seven feet of the defender when he starts to break him down.
The shot must be taken within 2 seconds of the initial break down.
The shot must happen within 33 feet of the basket.
The player must not be smothered defensively by the defender at both the start of the break down and the release of the shot.
Effect
Up to 100% decrease in shot penalty.
Example Players
Kobe Bryant
Deadeye

What Happens
Defenders that arrive late to defend a shot have less of an affect on Deadeye skilled players.
Requires
The skill will not be triggered if the shooter is smothered by the defender at both the beginning and end of the shot.
Effect
Up to 100% decrease in shot penalty.
Example Players
Kobe Bryant, Kevin Durant
Corner Specialist

What Happens
This player is more likely to hit a long-range shot from a corner where baseline meets sideline.
Requires
The player must be standing still, be open, and must take the shot within two seconds of catching the pass.
Effect
5% increase to shot percentage.
Example Players
Shane Battier, Courtney Lee
Post Proficiency

What Happens
This type of player is nearly unstoppable in the low post.
Requires
The shot must be taken within 17 feet of the basket, and can be taken within 0.5 of exiting the post to make a pump-fake.
Effect
Defenders fall for fakes 50% more often, hooks and fades are 5% more likely to hit, and post moves are more effective.
Example Players
Al Jefferson, LaMarcus Aldridge
Ankle Breaker

What Happens
This player can break ankles when performing successful isolation dribble moves.
Requires
N/A
Effect
It causes a 30% increase in a defender stumbling and falling over.
Example Players
Jamal Crawford, Tyreke Evans
Post Playmaker

What Happens
This player has good court vision and can pass out of the post to the open player for the good play.
Requires
The pass must come from a post-up position to an open teammate.
Effect
The receiver will have up to 10% increase on two-point shot and 4% increase on three-point shots.
Example Players
Kevin Garnett, Joakim Noah
Dimer

What Happens
This type of player can hit players in the right position with superb passing abilities.
Requires
This occurs when passing to a teammate from anywhere other than the post.
Effect
The receiver will have up to 10% increase on two-point shot and 4% increase on three-point shots.
Example Players
Chris Paul, Steve Nash
Break Starter

What Happens
This player initiate fast breaks with great outlet passing.
Requires
The player must be a defensive rebounder and the pass must be made within three seconds of the rebound.
Effect
There is a 50% decrease in the possibility of a bad long-range pass if requirements are met.
Example Players
Tim Duncan, Lamar Odom
Alley-Ooper

What Happens
This player can throw the accurate alley-oop pass.
Requires
N/A
Effect
A significant boost to a player's pass attribute.
Example Players
Andre Miller, Jason Kidd
Brick Wall

What Happens
This player can set the powerful, unmovable screen.
Requires
N/A
Effect
Stumbling, falling opposing players that bump into the effective screen.
Example Players
Kendrick Perkins, Glen Davis
Lockdown Defender

What Happens
This player is a superb perimeter defender that can shut down any other Signature Skills of the attacking player they're guarding.
Requires
N/A
Effect
N/A
Example Players
Thabo Sefolosha
Charge Card

What Happens
This type of player has the uncanny ability to draw a charge.
Requires
N/A
Effect
There is a 50% increase in the chance of drawing a charge when using this sort of player for a set. If the call is made, the player's teammates receive a temporary energy boost.
Example Players
Udonis Haslem
Interceptor

What Happens
This player has a good ability to make the pass lane steal.
Requires
The player must be within 9 feet of the passer.
Effect
The player will get a boost to Steal and Vertical attributes.
Example Players
Trevor Ariza, Brandon Jennings
Pick Pocket

What Happens
This player has the ability to steal the ball from players attempting dribbling moves.
Requires
N/A
Effect
There will be an increase in strip probability when the player is in an iso-motion move, an increase when the offensive player has been in a standing dribble for a few seconds, and a lowered chance of causing a foul.
Example Players
Ricky Rubio, Jeremy Lim
Active Hands

What Happens
This player can easily stream the ball when a player attempts a shot, layup or dunk.
Requires
N/A
Effect
This type of player is twice as likely to strip the ball from a player that doesn't have this skill.
Example Players
Mario Chalmers
Eraser

What Happens
This player guards the ring like a beast with emphatic, powerful blocks.
Requires
N/A
Effect
This will cause a boost in energy for teammates and a drop of up to six points of the rejected player's shooting attributes.
Example Players
Dwight Howard
Chase Down Artist

What Happens
This player has a knack of chasing down players on the fast break for the swat or steal.
Requires
The block must happen from behind the shooter while he is moving.
Effect
This player is given a boost in Block, Vertical and Quickness attributes when the opposition is on a fast break.
Example Players
LeBron James
Bruiser

What Happens
This players can have a negative affect on an opposition player's physical strength with every bit of contact.
Requires
N/A
Effect
When a Bruiser makes contact with an opposition player, the player will loser almost half of the amount of energy than they would if they were sprinting.
Example Players
David West, Anderson Varajao
Hustle Points

What Happens
This player has a knack of scoring following an offensive rebound.
Requires
The shot must be taken within three seconds of grabbing the offensive rebound.
Effect
There will be a boost to Shot Inside, Shot Close and Layup attributes.
Example Players
David Lee, Andrew Bynum
Scrapper

What Happens
This type of player will dive for looser balls, win boxout battles and strip rebounds from opponents.
Requires
N/A
Effect
Speed and Quickness get a small boost when diving for loose balls.
Example Players
Chuck Hayes, Reggie Evans
Anti-Freeze

What Happens
This type of player is basically steady and collected: while they will miss shots every now and then, they rarely go on a cold-streak.
Requires
N/A
Effect
This player takes twice as many misses and turnovers to go through a cold streak as a normal player.
Example Players
Luol Deng, Zach Randolph
Microwave

What Happens
This type of player can heat up offensively and defensively, very quickly.
Requires
N/A
Effect
It takes this player fewer shots and good plays to get on a role than other players without this skill.
Example Players
Eric Gordon, Nick Young
Heat Retention

What Happens
This type of player keeps their heat streak through bad plays, game breaks and misses.
Requires
N/A
Effect
It takes twice as many missed shots and turnovers and a player that is "Hot" to break out of their heat streak.
Example Players
Kobe Bryant, Deron Williams
Closer

What Happens
This player takes their skill to a new level in the fourth quarter.
Requires
Player to be on the court in the final 40% of a match.
Effect
Attributes are boosted up to 12 points, easier free throws, energy boosts during timeouts, 5% increase of making "moving" shots and step-back shots.
Example Players
Kobe Bryant, Derrick Rose
Floor General

What Happens
This player can help his teammates defensively just by being on the court.
Requires
N/A
Effect
When this player has the ball, his teammates on the court get a six point attribute boost to all of their offensive abilities.
Example Players
Rajon Rondo, Chris Paul, Jason Kidd
Defensive Anchor

What Happens
This player turns his team into a defensive powerhouse, just by being on the court.
Requires
N/A
Effect
When this player is on the court, his teammates defensive attributes are given a six point increase.
Example Players
Tyson Chandler, Dwight Howard