Even though, achievements are pretty easy I wanted to prepare this achievement guide in case anyone is stuck.

Tourist
Walk 1000 meters.

• It will be one of the first achievements you unlock.

Running Man
During the mission run more than walk.

• It is another easy achievement. If you have any problem you can run around without doing anything.

Groundhog Day
Die 50 times.

• If you are a normal human being, you will have this achievement as you progress.

World of Glass
Break 25 windows.

• Pretty straight forward, just shoot some windows.

Collector
Pick up 250 evidences.

• You will unlock it as you progress. Just pick the evidence and guns. If you want a quicker way, you can use custom maps.

The right to remain silent
Secure 100 suspects.

• Approximately, you will have it halfway through the story.

I am the Law
Kill 100 suspects.

• If you are going for A at the every mission, you may need to repeat some levels.

Weighty argument
Fire 1000 bullets.

• Without the extra clip equipment you will have 75 bullets pper mission. You can shoot around to get the achievement but probably you won't need it because of the "I am the Law" achievement.

Get down!
Shout 1000 times.

• You will unlock it as you progress. If not, spam E.

Door Kickers
Blow up, lockpick or break down 100 closed doors.

• I did not have this one, when I finished the story. Using the places like music club or first bomb area will give you three locked doors to unlock. Only add civilians to the level and farm the doors.

Police Brutality
Kill a surrendered or cuffed suspect with the buttstock.

• Use melee to a surrendered enemy until you kill him.

Retribution
Die at the same time as the suspect who killed you.

• Probably it will happen by itself. You need to shoot someone while that person shoots you at the same time. Don't use the armor and go trigger happy (warning could be helpful to give them time).

Angel of Vengeance
Kill the suspect who has just killed your teammate.

• Send your partner to enemies and he will die. After that, you can do the defibrillator achievement.

Last Chance
Kill a suspect with the last bullet in your magazine.

• By default you have 3 magazines. Just empty all of your magazine until you have only one bullet.

At the Right Time
Kill a suspect while he is reloading.

• Even though, it is easier with a shield, you can do it without shield if you position yourself.

Dirty Harry
Leave over 50 bloody steps in one mission.

• When you move over a dead body, you may be able to leave 4-5 bloody steps. Wander around a bit with your bloody shoes. Achievement will be unlocked at the end.

Lone Wolf
Complete the mission with Rick left standing at the spawn.

• You can do this at the first levels. You will not need his equipments. You should order him to stand where you started.

Bad Boys
Complete the mission in any multiplayer mode.

• As you can understand you will need another person for this achievement or you can select "local co-op" if you have a controller and join as second player. Adding only one civilian will make it quicker.

Police Academy
View all tutorial slides.

• You will get this at the first bomb level.

Mercy
Complete mission without killing any suspects.

• It is better to try it after unlocking the taser gun. You can charge you enemies and melee them if they are alone and close the door. Camera is a good choice to survey the area. Don't forget your partner have equipment too. Bombs, breach kit and armor or medikit is useful

Fair Play
Get the first A.

• You will need a high grade for this achievement. This means no death (depending on the mission you may kill one or two), no injury (if you have a medikit it is not a big problem since it gives points). You will need all of the evidences but you do not need the time bonus. Because of the defuse points bomb missions are easier.

Flawless
Get the first A+.

• You will need a high grade for this achievement. This means no death, no injury (if you have a medikit it is not a big problem since it gives points). You will need all of the evidences and depending on the mission you do not need the time bonus. Because of the defuse points bomb missions are easier. For the first mission, you will get 10,000 for completion without a mistake. You will need the time bonus for this mission which you have to have more than 200 bonus points. If you try to do at a bomb mission you won't need a time bonus.

Rookie
Successfully complete 10 missions.

• No need to explain I assume.

Police Story
Complete the story.

• Again, it is pretty self-explanatory.

Professional
Complete the story a grade no lower than A-.

• You will need high grades at the all of the missions for this achievement. This means no death (depending on the mission you may kill one or two), no injury (if you have a medikit it is not a big problem since it gives points). You will need all of the evidences but you do not need the time bonus. Because of the defuse points bomb missions are easier.

Gunsmith
Unlock all equipment.

• You don't need to do anything special unlock equipment. It will unlock further you progress.

Not On My Watch
Revive your teammate using the defibrillator.

• Defibrillator will unlock as you progress.

Blind Fury
Kill a suspect while you are blinded by a flashbang.

• You can use your partner's flashbang too.

Hat Trick
Blind or stun more than three suspects with a single flashbang or C4.

• You can use boreoscope to see how many people in the room.

Die Hard
Stay alive after getting hit by three bullets.

• You can use a medikit after you got shot or you can use armor.

Clear!
Shoot a suspect with the taser.

• Since the taser is the best equipment, you will use it for clean playthrough anyway.

Brought a knife to a gunfight
Get killed while holding any equipment (excluding the ballistic shield, taser and pepper spray).

• Just equip one of the items and wander.

Without Knocking
Kill a suspect through the door.

• You will need the magnum bullets equipment for this achievement. After equipping it prior to mission you can shoot through the door.

Naked Gun
Kill the suspect with the handgun left after the destruction of your ballistic shield.

• It is pretty self-explanatory.

The Hurt Blocker
Defuse your first bomb.

• Cut the wire or use the code to defuse it.

Sapper
Defuse 10 bombs successfully.

• There are 4-5 bombs in the story. So, you can do this achievement easily without trying.

Soldier of Fortune
Defuse the bomb by successfully cutting the wire.

• There are three cables; so, your chance isn't low. And if it is you will get the other achievement.

Blown Away
Detonate a bomb by cutting the wrong wire.

• There are three cables. If you cut it succesfully, at least you get the other achievement.

Close Shave
Successfully defuse a bomb with less than 10 seconds remaining

• Just wait until you have less than 10 seconds with the code.

Thank you for checking my guide. If you have any suggestions or if you see any mistakes (information, typo, etc.), please let me know. Have a nice day!