You have to complete the story mode with a specific character from Mr. X Nightmare DLC in single-player.
Can be done on easy difficulty. To be sure, complete the 12 levels without switching character.

All Clear: Estel
Complete the campaign in single-player mode as Estel.


All Clear: Shiva
Complete the campaign in single-player mode as Shiva.


All Clear: Max
Complete the campaign in single-player mode as Max.


Ultimate Warrior
Unlock all alternate moves for one character.
Faster with SOR1 characters because they have only 1 alternate move.


The Possibilities Are Endless
Unlock all alternate moves for all characters.


Alternate moves are unlocked by completing Survival with a specific character. They can be used in any game modes. Play several times with the characters until you unlock them all. The more waves you complete, the faster you will unlock them.


Phantom in the Hull
Reach level 18 in Survival mode.


I Am the One
Reach level 30 in Survival mode.


Clown Wars
Lead an army of 3 clowns.


You need to unlock Roo first:

• Hover over the Story mode at the main menu
  
• Hold Attack button, then Up, then Start
  
• Roo should now be unlocked in the character selection.

Then run a stage. Press Start , restart the stage with 2 stars assist and use your Star move ( + ) 3 times in a row to make appear 3 clowns.

You have to complete the story mode with a specific character from the main game in single-player;
Can be done on easy difficulty. To be sure, complete the 12 levels without switching character.

All Clear: Axel
Complete the campaign in single-player mode as Axel.


All Clear: Blaze
Complete the campaign in single-player mode as Blaze.


All Clear: Cherry
Complete the campaign in single-player mode as Cherry.


All Clear: Floyd
Complete the campaign in single-player mode as Floyd.


All Clear: Adam
Complete the campaign in single-player mode as Adam.


All Clear: SOR1
Complete the campaign in single-player mode with a "SOR1" character.


All Clear: SOR2
Complete the campaign in single-player mode with a "SOR2" character.


All Clear: SOR3
Complete the campaign in single-player mode with a "SOR3" character.


If you are missing a character, here is how to unlock them:

• Adam Hunter - Beat chapter four of the campaign
  
• Streets of Rage 1: Axel Stone - 200,000 lifetime points
  
• Streets of Rage 1: Adam Hunter - 250,000 lifetime points
  
• Streets of Rage 1: Blaze Fielding - 310,000 lifetime points
  
• Streets of Rage 2: Max Thunder - 390,000 lifetime points
  
• Streets of Rage 2: Axel Stone - 480,000 lifetime points
  
• Streets of Rage 2: Blaze Fielding - 570,000 lifetime points
  
• Streets of Rage 2: Skate Hunter - 650,000 lifetime points
  
• Streets of Rage 3: Axel Stone - 730,000 lifetime points
  
• Streets of Rage 3: Blaze Fielding - 840, 000 lifetime points
  
• Streets of Rage 3: Skate Hunter - 940,000 lifetime points
  
• Streets of Rage 3: Dr Gilbert Zan - 1,050,000 lifetime points
  
• Streets of Rage 3: Shiva - 1,150,000 lifetime points

You will unlock these achievements during the story mode.

Miss Me?
Meet Adam.
Unlocked at the end of stage 4.


Dojo Master
Beat Shiva.
Unlocked at the end of stage 6.

Snap Out of It
Beat possessed Max.
Unlocked at the end of stage 9.

Old-Schooled
Beat Mr. and Ms. Y.
Unlocked at the end of stage 12.

You must score a certain number of points in one cycle without interrupting it to achieve a combo.

Combo Pro
Achieve an "Super!" combo.
Get 200 damage in a combo.

Combo Expert
Achieve an "Amazing!!" combo.
Get 500 damage in a combo.

Combo Master
Achieve an "Out of this world!!!" combo.
Get 1000 damage in a combo.


Stage 2: Police Precinct - Mania Difficulty
Once the stage starts, press Start and retry. Add 3 lives and 2 stars assist.
If you're in danger, use Defensive special ().

Eating off the Ground
Consume a healing item.
Find a food item (apple or chicken) and pick it up by pressing


Oops
Hit an ally.
Start up a 2 player game (local or online). Once the game starts just attack the other player.


Birth of the Cool
Catch a weapon in the air.
Get a weapon. Throw it against an enemy or a wall, with the good timing you can catch it.

Dude, My Car!
Break the car in The Streets.
This achievement can be unlocked on Stage 1 - The Streets.
In the first stage, a car will crash against a wall. Just destroy it.


Life's a Struggle
Free yourself from a grab.
This achievement can be unlocked on Stage 2 - Police Precinct.
Some enemies can grab you. Press any button several times to free yourself from a grab.
For example, the policemen in the 2nd stage.


Wasted Wine
Break a wine bottle.
This achievement can be unlocked on Stage 3 - Cargo Ship.
In the boss room on Stage 3 there is a bottle next to the captain's chair. Pick up the bottle and hit someone with it.

Collateral Damage
Use a barrel or a grenade explosion to kill 3 enemies at the same time.
This achievement can be unlocked on Stage 3 - Cargo Ship.

There is a barrel in the bottom right hand corner at the beginning at the level. Once 3 enemies approach, punch the barrel and move away. If you don't kill 3, push and retry until you get it. Best done on Easy difficulty.

THIS IS WOOD OAK CITY!!!
Kill an enemy by tossing them in a hole.
This achievement can be unlocked on Stage 4 - Old Pier.

During the stage, there are holes on the ground. Just hit or throw an enemy in the hole.


Walk on Foot
Destroy all motorcycles.
This achievement can be unlocked on Stage 5 - Underground.
At the end of Stage 5, during the boss fight, there are motorcycles around you, you just destroy them all during the fight.

Broke My Toy
Break a spear.
This achievement can be unlocked on Stage 6 - Chinatown.

In the middle of the stage, after defeating the white karategi fighter, you will enter a antique weapon room. You can find a spear which will break after around 10 hits.

It's Chilly in Here
Break both elevator window panes.
This achievement can be unlocked on Stage 9 - Y Tower.
In this stage, you will go in an elevator. You can break the window panes on the left and on the right by throwing enemies.

Demolition Man
Use a wrecking ball to kill an enemy.
This achievement can be unlocked on Stage 10 - To The Concert.

An Elegant Death
Use a chandelier to kill an enemy.
This achievement can be unlocked on Stage 12 - Y Island.
After entering the castle, there will be a spot you can hit down the chandelier. Hit it when an enemy is below the chandelier.

Somebody Call the Cops!
Call the police with a Streets of Rage 1 character.
Play with a Streets of Rage 1 character and perform a Special Move (), it will call the police like the first game from 1991!

Family Reunion
Get the Golden Chicken from the art gallery to the stock room.
This achievement can be done at Stage 8 - Art Gallery.

Near the beginning of the level will be a statue of a gold version of the chicken health power up. Break it and pick it up, carry it all the way through the museum to the stock room.
DO NOT USE THE GOLDEN CHICKEN AS A WEAPON!!
To achieve this, stand still and press to drop the chicken, then defeat enemies.


Throwback
Discover a retro level.
You need attack an Arcade Machine with a taser gun.

• Stage 2 - Police Precint: Inside a open door near the cells. You will fight against Jack.
  
• Stage 4 - Old Pier: Inside the room with the sign written 'Arcade'. You can enter through the side door. You will fight against Zamza.
  
• Stage 5 - Underground: Inside the Bar close to the 'Heaven Man' Sign. You will fight against Abadede.
  
• Stage 8 - Art Gallery: In the Stock Room close to the Golden Chickens. You will fight against Shiva and Mr.X.
  

Stage Mastery
Get an S-Rank on any stage.
To achieve it, you need to score around 20,000 points at the end of a stage on Easy difficulty. The most important thing is to raise the combo counter as high as possible.
Few tips:

• Do not use your "Star Move" ( + ), you will earn 500 points for each you save
  
• If possible, pick up food when your life is full, you will earn extra points (300 points for apple, 1000 points for chicken)

Maniac
Get an S-Rank on all stages on Hard difficulty or higher.
If you want more details, you can read the following guide:

https://test-steamproxy.haloskins.io/sharedfiles/filedetails/?id=2176383534

All Too Easy
Complete a stage on Mania difficulty.
Select Mania difficulty. It is easier on the first stage and in coop.
Restart the stage with the bonus (3 more life but less points). It will give you more chance to finish it.

Perfect
Complete a stage without taking damage.


Stage 7 - Skytrain on Easy Difficulty
Character : Skate (SOR3)


100 Yen
Clear the Arcade mode on Hard difficulty or higher.
Easier in coop.


Bleeding Knuckles
Reach a lifetime score of 5,000,000.
Easy but long: you will get lifetime score when you complete a stage.
Better rank you have, more points you earn.
You will have extra points for the first time you finish the stage with each character in solo, and for 2, 3 or 4 players.

I hope this guide will help you.
If you find a mistake, please let me know.