UPDATE CHANGELOG:
The three biggest changes:
• The Infamous system - With the new Infamy system the player can continue to advance beyond reputation level 100. Becoming infamous will reset the player to reputation level 0 but unlocks the new Infamy tree where the player can invest Infamy points and unlock more stat bonuses as well as new content such as masks, materials and patterns.
• The Cloaker Enemy – The return of the special law enforcer from PAYDAY: The Heist.
• The selective fire mode system – All payers are now able to toggle Single- and Auto-fire with their weapons.
 
Infamy system:
• Added the Infamy system
• Added a Infamy skill tree bonus that will increase the Infamous drop rate
• Added a Infamy skill tree bonus that will increase the experienced gained
• Added a Infamy skill tree bonus that will reduce the cash cost for every skill
• Added a Infamy skill tree bonus that will reduce the skill point requirement for each skill tier
• Added the Heat mask
• Added the plague Doctor mask
• Added the Butcher mask
• Added the Specialist mask
• Added the Spectre mask
• Added the Dark Leather material
• Added the Copper material
• Added the Electric material
• Added the Sinister material
• Added the Imperial pattern
• Added the Bounty Hunter pattern
• Added the Guardian pattern
• Added the Ribcage pattern
• When you are Infamous, an infamy icon will be shown in front of your name above your character and in the chat
• Added new sound effects for the Infamy system along with an Infamous soundtrack that has a chance to play if someone in the crew is Infamous
 
Weapons:
• Added the Interceptor 45 Pistol
• Added the Ventilated .45 mod
• Added the Velocity .45 mod
• Added the Extended mod
• Added the Expert mod
• Added the Match mod
• Added the Acough sight mod
• Added selective fire mode which means that players, by pressing the "Right Arrow Key" using any weapon that can fire full-auto now also can switch to semi-automatic (except the Swedish K Submachine Gun)
• Added Rate of Fire as a new weapon stat
• Added Total Ammo as a new weapon stat
• Fixed a third person size issue with the Compact-5 Submachine Gun
• Fixed an issue with the AK5 Rifle where the iron sight was clipping
 
Masks:
• Added the Happy Santa mask
• Added the Hockey Heat mask
• Added the Mark mask
 
 
Gameplay:
 
• Hosting Ability: Invite friends to play in the new DLC heists even if they don’t own the DLC themselves.
• Added a feature so that assets can be bought by anyone in the loud-out menu, not just the host
• Added a feature where system messages will explain what other players are doing in the chat (who bought the asset, who is joining the game, who left game)
• Added a new blood effect when the player is hit by an enemy melee attack
• Added a new hit effect when the player is hit by an enemy melee attack
 
Skills:
• Balanced the Sharpshooter Basic skill from 50% down to 20% for single shot, skill was incorrectly giving players 80% instead of 50% before. The reason for the skill reduction is that we introduced single shot fire which made it unbalanced with the previous settings
 
Menu:
• Crime.net database has been added to Crime.net. Clicking on this icon will open up another menu where the player can choose to read about the characters. Each character has a briefing and a video
• The load-out menu has been re-customized
• Added the new Light Machine Gun tab in the primary weapons inventory menu
• Added the new Melee tab in the inventory menu
• Increased the total amount of mask and weapon slots from 18 to 72
• Added the Contents Update page where players can view the most recent DLCs
 
Level:
• Fixed an issue on Park Escape where players could see through the world
• Fixed a bug where a flash grenade could explode in stealth mode on day one of Framing Frame.
• Fixed an issue on day one of Firestarter where a group of enemies would get stuck at their spawn point
• Fixed an issue on day two of Firestarter where two clients would crash when a client would deploy a sentry gun in the server room
• Fixed an issue on day three of the Firestarter job where the player could escape after securing a bag
• Fixed an issue so you can no longer jump yourself up and over in the blocked parts on The Banks Heists
• Fixed an issue on with the safe collision on Jewelry Store
• Fixed an issue on where the van wouldn't open when the player was in stealth mode on Diamond Store
• Fixed a collision issue with bags on Watch Dogs day one
 
Law Enforcers and others:
• The Cloaker enemy was added to the game on every heist and in every difficulty except for normal
• Law enforcers can now use melee weapons. Being hit by a law enforcer no longer makes the player crouch, instead the player's sprint will be interrupted
• Fixed an issue with law enforcers and other AI characters where they would run into stuff when performing the 'starting' animations
• Enemies can now sprint short distances
• If you convert a highlighted law enforcer the red outline will be replaced by the blue outline as originally intended
• Fixed an issue where Shields would spawn in oversized groups
• When joining a game, converted law enforcers now show their outline properly
• Fixed an AI related issue when the player would board up windows
• Made a fix for law enforcers and others that would sometime prematurely reset their actions and skip their animations
• Made a fix for law enforcers and others that would turn in the wrong direction
• When joining a game, converted law enforcers now show their outline properly
 
System:
• Fixed a freeze crash in the inventory menu
• Removed the ability to interact with security consoles behind walls
• Fixed a crash that would happen when crew AI would get hit by trip mine damage
• Fixed a possible crash issue for the host when the host would finish the heist
• Fixed an issue where the player would crash when quitting the game to menu
• Fixed an issue where the player would crash because of an AI movement issue
• Fixed a crash issue related to the AI on Big Oil day one
• Fixed a crash issue related to players dropping out on Big Oil day two
• Fixed a crash issue on Night Club
• Fixed a crash issue when the host was in custody and someone got tased
• Fixed an issue in single player where the game would crash in the mission briefing screen if a texture was missing
• Fixed a crash that would occur in the PAYDAY loot drop phase
• Fixed a crash on day 1 of the Rats job that would occur during normal play
• Fixed a crash on day 2 of the Watchdogs job where the host would crash during an assault
• Fixed a sentry gun related crash
• Fixed an issue where the game would crash if the player was in custody and there were no civilians left
• Fixed an issue where the game would crash if a player converted a law enforcer
• Made a fix for losing accuracy stat in end screen when sawing open deposit locks
 
Sound:
• Added the track "Sirens in the Distance" to the game
• Added the track "Wanted dead or alive" to the game
• Added the track "Armed to the teeth" to the game
• Improved the quality of all weapon reload sounds
• Added sound dialogue to the Crime.net Database
Localization:
• Made a big update to all languages
 
 
 
Source : http://forums.steampowered.com/for [...] ?t=3246410