Challenges are within every level. There are a total of 278 that are available. There are level specific challenges, and challenges that are universal for each mission. If you are replaying a level, you may quit out or restart the checkpoint and the challenge would have saved.

Note: Cannot be obtained on easy difficulty.

For specific information on the challenges which help you complete them, visit the below thread.

Challenges Guide

See "Grand Master" achievement description.

You can slow down time and get headshots easily by holding lightly, then fully pulling it when you have a clear shot. There are a few levels with the sniper rifle so you can just keep playing those sections until you run out of ammo or die. The best level to attempt this is the last level called Absolution. The very start of the level arms you with a sniper rifle that has a silencer. You can pick off multiple enemies and just reload your checkpoint.

See "Grand Master" achievement description.

There are 5 total difficulties to choose from:

• Easy
• Normal
• Hard
• Expert
• Purist

Complete each mission on Hard or higher without changing the difficulty. Pick one of those difficulties and stick with it until you have the achievement. All three are considered "professional". You have no player activated checkpoints and enemies have better than average reaction times. Also your instinct won't restore on it's own.

You always have the option to replay missions on easier settings. The game always asks you what difficulty you want to play the missions on. If you play the entire game on Normal, you can just replay missions on Hard to gain the achievement. You do not have to restart the entire game. Replaying missions will work.

You can view a video walkthrough for all levels on hard HERE.

There are a total of 20 different play styles that you earn. They can be viewed in the Unlocks section from the main menu. There is a hidden amount you must complete for each, so just keep doing the task to gain them. A lot of them can be done on civilians in crowded areas such as Chinatown, so don't make them harder than they have to be. They unlock and show you a notification when you meet the requirements while in the mission.

• Needle Pumper: Stealth Kill with Syringes 5 times. You can technically be spotted and hide somewhere, then stealth kill people as they are hunting you. There is a syringe in the mission "Rosewood" right by the first fuse you must collect as part of an obejective.
• Undertaker: Hide 5 bodies. As you kill enemies, just remember to hide them.
• Piano Man: Kill 5 people with the garrot (your wire) via steath.
• Reaper Man: Use Point Shooting to kill 8 enemies. This seems tough at first but it's not. Civilians count and shotguns can actually be used for Point Shooting. In Chinatown this works very well if you have a shotgun and full instinct.
• Sandman: Subdue 3 people. This should come naturally as you play.
• Dynasty Warrior: Get 9 kills with Katana.
• Dynamite Harry: Get 5 kills with remote explosives.Extremely easy in Chinatown. In the first Chinatown you come across on the second level, there are explosives in an alley on the left near a yellow car (go up the stairs). Grab the remote detonator and throw the explosives into a crowd and detonate it.
• Gunslinger: Get 15 kills with revolver.A revolver is any gun with a revolving barrel (the circular middle piece). Start up Birdie's Gift which starts you in a gun shop. The back wall has a Mustang Snub. Grab it and run around trying to find ammo for it (stock it at 60). Now Kill some people and run up the stairs past the employee only swinging door. Hold off and kill people when they come up.
• Bartender: Get 5 kills with bottles.Easiest to do on the mission Welcome To Hope. The area you start in is a bar and has tons of bottles. Go into the bathroom and flip the lever to cause a bar fight. No go and grab bottles attack people with them.
• Champion: 5 hand based combat kills. An extremely easy way to get this is to walk into a crowded location like Chinatown and just keep pressing as you move around, killing everyone with your hands.
• Beserker: Get 5 kills with fire axe.
• Brutus: 5 stealth kills with knives.
• Viking: Get 5 kills with blunt weapon. A good spot is in Hunter and the Hunted. When you get to Chinatown, stick to your left until you get to stairs leading down. By a trash can you will find a sledgehammer. Go kill people in the crowds or police with it. Try to make sure it is swinging and hitting them, not choking them.
• Tank: Take damage 20 times. Should come naturally.
• Pitcher: Kill 5 people with thrown objects undetected (knife, axe, screwdriver, etc).A good area to get this is the last area of Rosewood. You start by a knife and there are 2 enemies to kill with it. Then the next area has 2 enemies and another knife. Then after that you can get your last.
• Spook: Get 3 kills with silenced gun undetected.These must be stealth kills (as in pressing while behind an enemy).
• Jinx: Get 2 kills via accidents. Many levels have "accidents" waiting to happen. There are a few which will kill multiple people.
• Maestro: Get 5 sniper rifle kills via headshots in a row.
• Glass Cannon: Get 3 shotgun kills while remaining undamaged.Works pretty well in crowds, as you can get 3 kills in one shot (crowds with lots of civilians).
• Bank Robber: Use 3 human shields without killing them. This works best on civilians in a crowded area. Just grab the person using when prompted to use as a human shield. Now quickly press to knock them out (so that they do not die from people shooting at you). Do so a few more times and you should see it unlock.

This can be obtained in any mission beyond the prologue (cannot be obtained in Personal Contract mission). Pick up an axe or a knife (or anything that is a sharp throwing weapon). Hold and aim for the head of the enemy. As long as it's red, press to throw it. If successful, the object will kill the enemy. The earliest you can get this is in Mission 2: The King of Chinatown. There are knives near the chefs. You can pick one up and use it to gain the achievement, then reload if you wish.

There are 45 pieces of evidence to collect through the missions. There is an in-game tracker that shows which evidence you have collected and on which levels. In the challenges screen during levels, you can see what section of the level has evidence and if you have obtained it or not. You can also view this from the main menu in the challenges section.

Visit this thread here for a guide to obtain them all. It's both written and has a video to help.

Evidence Location Guide

Go into Contract Mode. Go into quickplay and choose any contract from the sets available. It's easiest to do a friend's challenge that they made extremely easy on purpose. After you complete the contract, you will see the "Like" feature. Press to pull up a menu to like or dislike the contract. Choose the plus symbol to like it and gain the achievement. If you dislike it, you will not be able to ever like it and will need to play a different contract.

Achievement Trading Thread

This can only be obtained after the first level. You must cause mischief/chaos within an area. Run around being careless, shooting people, not sneaking around, etc. Enemies will become hostile and attack you. Kill all enemies and once things are back to normal, the achievement unlocks. See One With the Shadows for similar achievement but hiding from everyone. This is best done with a low amount of enemies around.

This is a total amount earned. If you wish you can boost this with a friend by making extremely easy contracts for one another to gain money quickly. You can also earn money on the tutorial. You cannot keep replaying the same contract to gain money. You can also play some through quickplay. Just remember, not everyone wants to make it easy on you. An easy contract is to play on Chinatown. As soon as you exit the doors, mark the 2 chefs. Use Point Shooting and exit to the door on the right. This can take under a minute to complete and earns you well over $100,000.

This game allows you to upgrade weapons by earning currency through contracts and completing missions. Use this money to buy an upgrade and unlock the achievement. Go into the "Unlocks" section, then to "Safehouse". Choose "Weapons". Move to Silverballer and you should see a money sign on the third icon in upgrade slots. Select upgrade with to buy it, and the achievement will unlock.

At the start screen, highlight the Contracts mode and enter it. Scroll down to Tutorials and choose "Creating Contracts". Complete this tutorial for the achievement. This shows you how to create contracts for others to play. Once you are done, you may link this with the "Competitive Spirit" achievement by sending out a competition for what you just created.

At the start screen, highlight the Contracts mode and enter it. Scroll down to Tutorials and choose "Contract Basics". Complete this tutorial for the achievement. This will show you how to finish a contract that has been created.

This can be obtained in any level. You can unlock a technique by having a high score at the end of a level's checkpoint. You are notified by the game if the level checkpoint grants you a technique and if so, what score is needed to obtain it.

Have someone on your friend's list create a contract, and play it. You can use the below thread to find people to help with this if no one on your list is playing the game. Go into quickplay and select "from friends". The achievement unlocks right away, you don't even have to play it if you don't need the money.

Achievement Trading Thread

Create a contract competition in Contract Mode. This can be easily obtained after doing the tutorial on how to create them. The game actually let's you use what you created as a competition afterwards. Just pick a friend (or many) and send it out.

Achievement Trading Thread

In Contract Mode, there are competitions you can play (multiple people invited). Go to the Compete menu and look at your challenges you have been invited to. If you need someone to create and invite you to these, please visit the achievement trading thread below.

This can only be obtained after the first level. You must cause mischief/chaos within an area. Run around being careless, shooting people, not sneaking around, etc. Enemies will become hostile and attack you. Hide from the enemies and once things are back to normal in a calm "Clear" state, the achievement will unlock (see Damage Control for similar achievement but killing everyone).

A very easy spot for this is Mission 3: Terminus. Go to the left of the hotel doors and down the ladder. There are only 2 people down there. Kill them openly and then hide until you get the achievement.

Note: It's claimed you must get into a disguise for it to unlock the achievement.

Silent Assassin is a a ranking at the end of a level. The very first mission you can get this is Mission 2: The King of Chinatown (since you can't get it in the prologue). The first time you can get this is in Mission 2: The King of Chinatown. To the right of the area where the target is, there is a area with chefs and they are selling food. Find the chef with the red apron (a female). Behind her is an odd looking dish with poisonous fish. After she turns her back, grab it. Now go North to where there is 2 chefs and a police guard. On the right, sneak in and find the disguise near the garbage. Walk to the middle area where the target has likely left. Poison his coffee and walk away. After he goes back and drinks the coffee, you are free to exit the level. You will also get the "Inconspicuous" achievement as well as "Whoops" if you had not already obtained it.

This can be done on any mission except the prologue (Mission 1: A Personal Contract). There are different "areas" in the missions which act as main checkpoints. Go through an entire area without ever being spotted and this achievement will unlock upon the next checkpoint or completing the level (if there was none after). The first time you can get this is in Mission 2: The King of Chinatown. To the right of the area where the target is, there is a area with chefs and they are selling food. Find the chef with the red apron (a female). Behind her is an odd looking dish with poisonous fish. After she turns her back, grab it. Now go North to where there is 2 chefs and a police guard. On the right, sneak in and find the disguise near the garbage. Walk to the middle area where the target has likely left. Poison his coffee and walk away. After he goes back and drinks the coffee, you are free to exit the level. You will also get the "Silent Assassin" achievement.

This cannot be done in the prologue (Mission 1: Personal Contract). Any other mission is fine. There is usually a challenge base don making a death look like an accident. You can get this in Mission 2: The King of Chinatown pretty easily. You have different ways to poison the enemy that will unlock the achievement. You can also disguise yourself as a chef near the back of the area. The target will eventually show up and eat some food. You should notice an opening in the ground, and the target notices this as well. He looks down it and you can push him to give him a closer look. This is one of the earliest spots to get the achievement but not the only one. There are several. You may just reload your checkpoint if you want to play the level a different way. Please see the "Silent Assassin" achievement for a video where you don't get caught.

This can be completed on Mission 2 and beyond. An easy place to get this is on Mission 2: The King of Chinatown. Walk into the crowded area where the main target is. Walk to a stand with food on it (there is a sushi plate). Grab the menu and you will look at it and blend in. Since there are police and the main target around, the achievement should automatically unlock.

Can be completed on Mission 2 and beyond. You must have instinct to use point shooting.. Hold and press . Aim for 3 headshots on the enemies, holding to aim and to tag. Press again to kill all 3. If you want this quickly, when you start Mission 2: The King of Chinatown, head to the central area where the target is. There are 3 policemen. You may execute them all with point and shoot to gain the achievement, and then just reload your checkpoint.

Cannot be done in the prologue (Mission 1: Personal Contract). There are areas that have places you can drop bodies in or even hide there yourself within the levels. After you kill or knock out an enemy, drag their bodies holding . Lead them to one of these containers, and choose to as your option to dump their body.

This achievement cannot be gained on the prologue mission "Personal Contract". This is a nonlethal way to take out an enemy. Have your bare hands equipped. Sneak up behind an enemy and press . Press the quickly as prompted, and the person will be knocked out. This can be done to enemies as well as civilians that you can disguise yourself as. You can do this on any difficulty. You can get this in Mission 2: The King of Chinatown quite easily.