Simply complete the first few missions of the game. For a complete walkthrough, check this thread. I recommend doing this in co-op so you can work towards the "Partners in Crime" achievement.

Play through and complete all of the missions in the Ronin story arc. For a complete walkthrough, check this thread. I recommend doing this in co-op so you can work towards the "Partners in Crime" achievement.

Play through and complete all of the missions in the Brotherhood story arc. For a complete walkthrough, check this thread. I recommend doing this in co-op so you can work towards the "Partners in Crime" achievement.

Play through and complete all of the missions in the Sons of Samedi story arc. For a complete walkthrough, check this thread. I recommend doing this in co-op so you can work towards the "Partners in Crime" achievement.

Complete all of the levels of every activity in Stilwater, excluding Hitman, Chop Shop, and Racing. When you have fully completed an activity, it will turn gray on your ingame map. See the individual activity achievements for additional help.

I recommend doing this in co-op so you can work towards the "Confidence Men" achievement.

In Crowd Control, you run security detail for a celebrity and protect them from crazed fans. You get a cash bonus for every fan you put down, and you must get a specified amount of cash to beat each level. If you let the fans get to the celebrity for too long, you will fail the mission.

The best way to dispose of the fans is to go up to them and hit to hold them as a human shield, line them up with one of the giant blue arrows, and toss them into it. This gives you a $750-1000 cash bonus, instead of the $250 you get for beating down a fan.

If you do not get the required amount of money quickly enough, fans will start coming in with assault rifles, and you have no hope of stopping them from killing the celebrity.

There are two Crowd Control activities with 6 levels apiece. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

In Demolition Derby, you are thrown into a large stadium with several other cars. The idea is to ram anyone you can, as you get a cash bonus every time you damage a car. You must get a specified amount of cash before you or all of the other cars explode. The trick to winning this is to use nitrous to get an immense speed and ram the other cars. To activate nitrous, click .

As you progress through levels, you are given "upgrade points" which you can use to upgrade your car's offense, defense and speed. Focus on the speed upgrades first, then offense, and finally defense.

There is one Demolition Derby activity with 6 levels. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

In Drug Trafficking, you must ride shotgun as a dealer meets up with his clients. In co-op, one of you will drive while the other rides shotgun. The starting levels are easy, but the later levels are nearly impossible. In the later levels, try these general pointers:

1. Get Homies to ride alongside with you. However, do not go out of your way to revive them.
2. Switch cars as often as possible. The FBI happens to be the optimal car for the mission.
3. When driving, try to get a single headshot on the drivers of the other cars. Don’t bother with stopped cars, you’ll be out of their range soon enough.

There are two Drug Trafficking activities with 6 levels apiece. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

In Escort, you will drive around a car while a hooker does her job in the backseat. If you are in co-op, one person will drive while the other one does the job. News Vans and the occasional Private Investigator will follow you, so keep out of their radius. It’s best to go on the highway, and drive at top speed on the wrong side. The oncoming traffic will take out most of your pursuers. On the later levels, you have to perform requests, so you may find yourself needing to get off the freeway so often it becomes inconvenient to use the freeway method.

Note: You can shoot the drivers of the cars to get rid of the radius, but this is impractical in most situations.

There are two Escort activities with 6 levels each. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

In Fight Club, you are pitted in a ring with several other people, and must kill them all. You cannot use any of your weapons, just your fists, but objects will spawn in the ring that you can pick up and beat your opponents with. I actually wouldn't recommend using any object. Even though you can knock down several enemies at once, the damage done to them is minimal and you become a target to everyone else. I would recommend throwing the object out of the ring or to the edge so the A.I. opponents can't use it.

The best way to play this is to get each enemy alone and fight them one-on-one. Use and to punch, and hold both to block. If you can land 3 successful punches in a row on an enemy, you will perform a finishing move that will greatly reduce their health. 2 finishing moves damages an enemy enough to allow you to finish them. Go up to them and hit to finish them. A short button-mashing sequence will pop up. Fill up the meter to break the person's neck and kill them.

There are two Fight Club activities with 6 levels apiece. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

In Heli Assault, you need to pilot a helicopter and escort one of your gangmates on land. Especially on the later levels, you'll find it virtually impossible to fly the chopper and work the guns at the same time, so you should definitely find a friend and do these missions in co-op. Enemy cars and eventually helicopters will tail both you and the car. The chain gun is worthless when compared to the rocket launcher, so use only that and try to make sure your car is out of the blast radius.

Every once in a while, your car will run out of gas, and you must go down and pick your teammates up. Go VERY slowly and carefully, or your teammates will fall out of the chopper. They won't die, but you may have trouble getting them back on. You'll no longer be tailed when you have them on your rudder, so just take your time and work your way to the objective.
 

In Septic Avenger, you work the pumps on a rogue septic truck, with the objective of spraying waste on everything you can. You need to spray virtually everything in your path to get the required amount of money, especially in the later levels. The good news is that your truck has nearly infinite health and there's no time limit. The only thing that will eventually stop you is when the truck finishes its route, but you can stop the truck by holding LT.
 

In Snatch, you must kill pimps and recruit their hos. After the hos are in the car with you, you must drop them off at your brothel. In co-op, you will also have the issue of a pimp attempting to take back your hos. The easiest way to do these activities is as follows. Please note that this is written with Level 6 in mind. Adjust for the other levels accordingly.

Get a co-op partner, and get into the same 4-door car. Now, normally, you're not supposed to be able to recruit more than one ho at a time, but you can cheat this if the two of you syncronize. Go to the set of hos furthest from a Forgive and Forget. The driver should recruit first, followed by the passenger shortly after. This takes a little bit of practice, but your goal is to get both of the hos in your party and in the car. Watch out for enemy gang members, as they have a habit of pulling you out of cars. Head to the Forgive and Forget and drive through it. Then, calmly make your way back to the brothel, making sure not to get the attention of gangs again.

You will again have to get hos, but a pimp could show up to try to take back the ones you already have. Now, head to the hos nearest the Forgive and Forget, pick them up, and head to the F+F again. Ideally, you should only have gang noteriety for several seconds, not enough time for a pimp to show up. Drop off your hos yet again, but this time, have one of you stay behind to defend the hos.

If you kill a ho you already dropped off, it's an instant fail, so be careful. The driver should quickly make two ho-runs, which should land you with 6 recruited hos in more than enough time to finish the level.

There are two Snatch activities with 6 levels apiece. I recommend doing this in co-op so you can work towards the "Confidence Men" achievement as well as "Crime Lord".

When you enter any one of those 4 cars, you will be given the opportunity to start a diversion. In this diversion you will have to do, well, whatever you would do if you drove the car for a living. Tow cars, put out fires, revive people, and take people from place to place, respectively. You need to go to the side of a normal street (not highway or dirt road) and call the corresponding numbers on your phone to get a car delivered.

Tow Truck - This seems to be the hardest one. There is no known number to call, you just have to drive around until you happen to see one. Additionally, the diversion itself is a huge pain. Please see this post for help.
Fire Truck - 555-FIRE
Ambulance - 911
Taxi - (555) 455-8008

In a car, you need to drive through all of the stunt jumps in Stilwater. This website seems to have the best guide for the collectibles.

In an aircraft, you need to fly through all of the stunt locations (barnstorms) in Stilwater. This website seems to have the best guide for the collectibles.

You need to find and collect all of the CDs in Stilwater for this achievement. If you find a CD in co-op, both you and your partner will get credit, regardless of where the partner is. This website seems to have the best guide for the collectibles.

You need to find and tag all of the spots in Stilwater for this achievement. If you tag a location in co-op, both you and your partner will get credit, regardless of where the partner is. This website seems to have the best guide for the collectibles.

- Hangman's Wharf, Stilwater Prison District. The southermost activity in the small island by the top left of the game map.
- Elysian Fields, Trailer Park District. The activity just northeast of the activity that's all the way on the southwest corner of the top island.
- Stilwater Boardwalk, Hotels & Marina District. On the top island, about 1/4 of the way in on the top right, there's a small dock with a shop on the tip of it. It's the activity just south of it.
- Harrowgate, Saint's Row District. There's a large amount of bridges connecting the two main islands of Stilwater. By the lower left of the third bridge in on the right, there are two activites. The lower of the two is the Hitman activity.
- Southern Cross, Barrio District. On the southern end of the map, just above the airport island, there is a lone activity around a bunch of stores. This is the Hitman activity.

For additional help, check this thread. 

For this achievement, you must enter and place (top 3) in all of the races on the Stilwater map. You can't choose the vehicle you drive, so you really have to out race the competition. The one good thing is that the CPU will always drive on the streets on road races, so you can sometimes take huge shortcuts. If you attempt these races after you have played through a significant part of the game, the GPS may give you a far more efficent route, as it will plot the previous shortcuts you have taken.

At the start of the game, quickly circle the map and try to pick up all the weapons and food you can. If you go up the stairs that are across the map from you, DO NOT advance out of the map, as you will instantly fail. The game will warn you as you are about to do this. Make sure you find pick up frags, as they will be your best friend later. Once you've picked up a melee weapon, a pistol, SMG, shotgun, and assault rifle, you're ready to get started. Use your melee weapon to kill the first 10 enemies.
 

Your melee weapon will break soon, so find another and resume attacking. Your NPC allies will begin to die, but do not revive them. They're pratically useless, and food is way too precious to waste on them. Clear out 30 zombies total to advance.
 

And now it's time for flaming zombies. If you know what you're doing, being set on fire should be the only real problem the game will present you with. Melee attacks on them are useless, as you will be set on fire. Kill a few more zombies with your melee weapon until the first flaming zombie shows up. If you have a co-op partner, regroup with him now. Switch to your pistol and click to enter precision aim. If you have a partner, stand back-to-back with him to eliminate all of your blind spots. Conserving ammo, carefully headshot as many zombies as you can. The zombies without an intact head can obviously not be headshot-ed, so just shoot them several times in the waist. Increase your death toll to 70 to continue.
 

Make your way to the base of the staircase. To the right of the stairs is what looks like the remains of a fountain. Go inside the pool area (by a big support collumn) and jump up the first few levels. You should end up on a platform about 6 feet off ground level, and completely out of the reach of zombies. Slowly and carefully pick off the zombies. You will eventually run out of pistol ammo, so do the same thing with your assault rifle until another 65 zombies have died to increase your kill total to 135.
 

And now you're down to the wire. Killing another 120 zombies means victory. You should shortly run out of assault rifle ammo, leaving you with a shotgun, SMG, and possibly a half-used melee weapon. The last of your teammates will die soon, so it's up to you to do all of the killing. Patience is a virtue here, let all of the zombies get within range of your shotgun so you can kill every one with one shot apiece. After you use up your shotgun, do the same with your SMG. You should run dry with about 75 zombies left. Use whatever else you may have picked up, then equip your melee weapon, make sure the coast is clear, and dash back to the point where you spawned. Kill any zombie you can safely kill, but watch out for the flaming ones. Keep circling the map, wasting all the zombies you can, and eventually a handful of zombies will set themselves on fire and die chasing you. Keep in mind you can always go back to the safe zone by the stairs to re-assess your situation. Keep circling and killing until the zombies are all gone and achievement unlocked.

In order to vehicle surf, simply run in front of any civilian car in order to get it to slow down and stop, in the same way you would hijack a car. Instead of hijacking it, hit to jump on top of the car. Obviously, the car must have a roof and be low enough to jump on top of. Get on the roof and wait for the car to start driving. When the game prompts you to, hit to start surfing. If you hit any sooner, you will hijack the car. You will then start balancing on the roof of the car, and a meter will pop up a la Tony Hawk. You can hit again to do a handstand, but all that will do is make it harder to balance. Use to keep your player steady. It will take 15-20 seconds to get three gold stars, at which point you will have to throw yourself off to end the Surfing session and get the achievement.

While in co-op, play and complete all of the missions in the Ronin story arc. This achievement will unlock with "Seppku" if you don't already have it. For a complete walkthrough, check this thread.

In order to start a co-op diversion, you must be in co-op with Friendly Fire on. (Pause Menu > Co-Op > Friendly Fire) Kill your teammate, and he will be given the option to start up one of two co-op games. It doesn't matter which one he picks, just have him select one. Take turns throwing the game so you can both unlock the achievement.

From the Main Menu, go to Multiplayer > Tutorial, and a video will play. You can skip it by hitting , but you should watch it in order to learn how to play the game. After the video plays, you will spawn in the tutorial lobby. The room you are in has 9 diagrams on the walls. Go up to each one, hit to bring up a paragraph on-screen, and hit to continue. Quickly do this for all 9 diagrams and the achievement will unlock.

For this achievement, you must win a Strong Arm round of each of the following Activities:

Demo Derby, Hitman, Insurance Fraud, Mayhem, Racing, Snatch, Theft

You must also win a round in each map while playing Strong Arm:

Little Shanghai, North Shore, Nuke Plant, Oldtown, Parthenon, Posiedon's Palace, Wharfside

You don't actually have to do this in a ranked game, so the quickest way is to just start up a Party match, set it to the map/activity you need, and get a friend to lose to you.

From the Main Menu, go to "Multiplayer" > "Xbox LIVE" > "Create Party". Select whatever you want for the Privacy, then once some people are in the Party with you, start up the game. It doesn't matter what you play, just win and the achievement will unlock.

The quickest way to win 10 matches would obviously be to set up a Party match and just win 10 matches that are set to Strong Arm. Get a friend to lose to you and it'll go even quicker.

See "Kingpin".

See "Kingpin".

Please visit this thread for a breakdown and guide for the badges.

To unlock this achievement, you will need to play the Co-Op game once. Co-op scoring is automatically turned on when you have another player in the game and select a mission from your clipboard. That's it. You don't even need to win, just play it through to completion and once the round is over, the achievement will unlock.

This time you will need to win the Co-Op game 5 times to unlock this achievement. You may want to boost this with a partner as you will struggle to find a random game by searching due to the lack of an online community. It is easiest to take turns letting each other get all the kills while you wait outside the mission area. After your 5th win the achievement will unlock.

From the main menu, go to Xbox Live, then Create Party. When the lobby is up, hit  to switch the game to Party Mode. Invite your boosting party to the lobby and start the game. The achievement will pop as soon as the game starts, you do not even need to finish it if you don't want to.

Invite your friend to your game, or join their game. Get in to a car, and begin to do stunts. This can be driving into oncoming traffic, jumps, etc, but is easiest to find a long stretch and drive on the wrong side of the road. As soon as you get a silver you will be able to press  to start the Stuntman Co-op game. The game is best 3 out of 5, and the target is to get more stunt points as your opponent. Easy to fix if working with your boosting partner.

Simply win 20 rounds, not games of the Stuntmen minigame. See "Rookie Stuntman" for information of how to play this game.

You can boost this easy in party mode. For information on how to get to party mode, see "Party Time." Go into settings, and change the game mode to Strong Arm, on the Little Shanghai map (any map will work but this is the smallest one). Spray all 4 tag spots (signified by a spray can) and this will unlock. Your partner can do this in the same game too.

You can boost this easy in party mode. For information on how to get to party mode, see "Party Time." Go into settings, and change the maximum kills to 10, 
On a small map, this will take 2 or 3 minutes at the most. Beat your boosting partner 10 times and this will unlock.