These are pretty straight forward. You will get each of these for playing on the specified difficulty. Lower difficulty achievements will be awarded if completed on a higher difficulty. I would recommend play on Very Hard on your first playthrough.

Destructive Beat
Complete the Campaign on Very Easy or Easy Difficulty


Violent Melody
Complete the Campaign on Normal Difficulty


Brutal Chorus
Complete the Campaign on Hard Difficulty


Blood Symphony
Complete the Campaign on Very Hard Difficulty



The following achievements all happen at various points throughout the story. You shouldn't need a guide for these, but I'm sure there is a full game walkthrough or two that you could find online if you get seriously stuck.

Fits Like a Glove
Meet your new best friend


Patched Up
Receive a software update for your leash


All Bow To Heavy Metal
Big head, big headache


Size Matters
Use your biggest weapon


Damsel in Distress
Rescue the princess


Destroyer of Worlds
Cause major destruction


Weed Killer
Tidy up the back yard


Minced Meat
Take out the Mall's biggest customer


Grilled Meat
Prepare a big meal using an improvised electric stove


Armed and dangerous
Grow as a person, experience betrayal. Again.


Stowaway
Catch a ride

These collectibles can be found throughout all the chapters starting from Act 2. You can see which collectibles you've found on the chapter select menu and you can replay any chapter to find those collectibles again. You can quit as soon as you find a collectible and it will be saved.

I won't outline locations here as there are several guides available online for these.
Here's a video guide by Plasma SKX: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=901259490

Newsbots are small robots wheeling around certain areas, which explode when shot. I actually managed to find these on my first playthrough, since they make constant noise which you can keep an ear out for.

Major Malfunction
Destroy 50% of the Newsbots in the Single Player Campaign


Total Malfunction
Destroy all Newsbots in the Single Player Campaign



These appear in swarms of about 6 Electroflies, all of which need to be taken out.

Insecticide
Destroy 50% of the Electroflies in the Single Player Campaign


Pest Control
Destroy all Electroflies in the Single Player Campaign



These aren't really traditional collectibles, as they continue to count when a checkpoint is loaded. The very first place you find these bottles, you can complete both of these achievements by reloading checkpoints and either drinking or shooting the bottles.

Space Pirate
Drink at least 20 bottles of Nom juice in the Single Player Campaign


Straight Edge
Destroy at least 20 bottles of Nom juice in the Single Player Campaign

Wannabe
Perform 10 different Single Player Skillshots


Somebody
Perform 25% of the Single Player Skillshots


Big Cheese
Perform 50% of the Single Player Skillshots


Celebrity
Perform 75% of the Single Player Skillshots


Golden Idol
Perform every Single Player Skillshot in the game


Once you are introduced to the Skillshot system (when you can first upgrade your equipment) the Skillshots will be activated.

Using the upgrade pod will allow you to view a list of all Skillshots in the game, most will remain hidden until you receive the equipment required to complete each Skillshot. However, there is an additional section of secret Skillshots.

I may create my own list here, but there's an existing guide listing all Skillshots in the game and how to complete them, including these secret ones: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=900936733

Master of Disaster
Earn 2000 points or more at once


This one requires you to get a score of at least 2000 in one Skillshot combo. This can be tricky to get without trying, but there are some locations in the game which allow an easier method. One place to get this easily is Act 7, Chapter 2. Run through a corridor of enemies, then use the thumper on two nearby groups of enemies back-to-back. This video by enonymous1 demonstrates this method:

You can do all of these achievements on any difficulty, so if you're not already going for the high difficulty completions, make things easier for yourself and play on the easiest setting.


Pointless
Execute at least 10 Headshots before you find the first DropKit


The prologue counts for this, so you can start a new game from the beginning and make your shots count up until you reach the dropkit in act 1. During the leash tutorial where you need to pull an enemy towards you, you can freely shoot at the enemies on the hill before progressing, giving you plenty of time (and heads) to get this.


Disco Inferno
Kill all enemies without leaving the dance floor in the city outskirts


During act 2 you'll come across a nightclub with a dance floor, it's hard to miss. Kill the miniboss on the dance floor, take his gun and kill everyone. Make sure not to leave the dance floor until the achievement pops. You can also get this in "The Club" map in echoes mode.


Om Nom Nom!
Feed a flytrap with a Nom parasite


Go to Act 4, Chapter 2 for this one. The Nom parasites are the glowing green blobs hanging around the level here. Kick one into one of the giant plants and it will slurp it up.


Chop-Chopper
Kill the enemy inside the airborne helicopter in the park


Load up Act 4, Chapter 2 for this one. In the park a helicopter comes over the hill with a gunner inside. Using the sniper rifle, wait for the chopper to sit still for a moment and guide a bullet into the enemy inside.


No Man Left Behind
Kill all enemies while escaping from the collapsed building


This one's in Act 4, Chapter 3, right at the end. There are two enemies near the elevator you need to escape on - ensure these are both dead and get on the elevator.


Red Barrels
Explode all the red barrels on the rooftop while in a helicopter


This one is in Act 5, Chapter 3. Before getting into the helicopter, make sure not to blow up any barrels too soon. Most of the barrels are easy to spot but if you're having trouble, this guide by Outer Heaven Guides has a counter as they shoot each one:
You will get the achievement as soon as you destroy the last barrel, so if you don't then restart the checkpoint and you'll be taken back to the start of this section.


I might be late
Kill all enemies during the sprint to the jumpship


Late in the level Act 7, Chapter 1, a 2-minute countdown will appear on the screen. At this point you must run and gun your way to the end, killing every enemy you see on the way. The timer is fairly lenient and you can easily get there with over 30 seconds remaining.


Just one last thing
Kill all enemies before you reach the escape capsule


In Act 7, Chapter 2 a timer will start at the climax of the level. You need to kill enemies between this point and the escape capsule at the end. Make sure you only start killing enemies once the timer has appeared.

The echoes are accessible via their own option on the main menu.


Remembrance
Play three different Echoes


Self-explanatory.


Shooting Star
Get at least 1 star on each Echo


There are required score breakpoints to get each of the star goals. Reach at least the first goal on every regular echo.


Star struck
Get 3 Stars on 10 different Echoes


Supernova
Get 3 stars on 20 different Echoes


There are 30 echoes total, so skip any that are particularly difficult and you may not have to go back to them. Though you will always need at least 1 star for the above achievement.


Bounty Hunter
Have a total of at least 125,000 points in Echoes Mode's total high score


Hoarder
Have a total of at least 250,000 points in Echoes Mode's total high score


At the top of the echoes list you can see a total score of all echoes, this where you can see your progress toward 125,000, then 250,000.


Guerrilla Tactics
Execute at least 25 different Skillshots in one Echo round


Not toooo difficult - just switch weapons occasionally so you can get fresh skillshots and try not to repeat the same ones too often. You can check the skillshot database to see which have been completed as well as how to do others.


Halfway There
Get at least 45 stars in Echoes Mode


Self-explanatory. You'll need at least 60 for Supernova anyway.


Old School
Finish an Echo round without executing a single Skillshot


Sounds difficult, but play the level Downtown and you can simply run past every enemy. You'll need to wait briefly in a later section for a miniboss to come out, but once they do just continue straight past them.


Enforcer
Get at least 15,000 points in one Echo round


Some echoes are longer/easier to get this in than others. Check out the scoreboards for which have generally higher scores.


Last Blood
At the end of Guns of Stygia, kill all the enemies on the walkways before the explosions do

After sliding down a rope for the second time, you will eventually come across an enemy shooting from a mounted turret. Once you get around to it from the side and pick it up, turn around and start shooting immediately.

There are two sets of enemies - one further back, then a second set closer. Kill them before their respective platforms explode. You may want to put some breaks in your shooting to avoid overheating.


Hell Razor
Kill a Burnout using the helicopter that arrives in Crash Site


This is right at the end of the echo. After beating two minibosses there's a final dropkit (recharge thumper here if needed), then a door that goes outside to a road. Follow the road down and once the two burnouts use the thumper on them so they get launched into the helicopter crashing nearby.


Fast Track
On Mean Street, kill all the snipers on the rooftop before the DNA bomb explodes


This happens right at the end when you watch a sniper get taken out then jump over an obstacle. You can hear a countdown in the dialogue (and see it in the subtitles) that indicates when the bomb will explode. Make sure you equip the sniper rifle before jumping into that area as you will see enemy indicators when zoomed in.


Up-Lifting
On Monorail Factory, kill all enemies whilst riding the lift


Once you activate the lift there are a few groups of enemies you will have to kill before you get to the top. There are 10-11 enemies all up and not much time to take each of them out. The easiest method seems to be bringing the shotgun and using its charged shot for the first 3 groups of enemies (including the big group of five), then kill the final solo enemy by any means. Probably a charged shot of something else to ensure it dies.

Anarchy is a mode accessible via the multiplayer option on the main menu. Despite it being multiplayer, you can create a private match and play solo.


Team Player
Complete 50 team challenges in your career in Anarchy mode


At the end of each wave the final enemy will be highlighted with a specific challenge to be completed by at least two players. You need to do 50 of these across various games (thankfully no longer 200 like the original game).


Anarchy Master
Achieve a score of at least 40,000 as a team in Anarchy mode


It's not super clear in the achievement description, but it requires a total score of 40,000 across all players within a single wave. Here are some tips for this one:

• You always get more point from team skillshots, so do that as much as possible
  
• There are more enemies in later waves, so you may need to get all the way to wave 20 to be able to get enough points
  
• The achievement unlocks as soon as you reach enough points, so if you don't get it towards the end of the wave you might want to fail on purpose so you can retry.

One specific recommended location for points is the tornado on Dead Rock. One player kicks an enemy, then the other leashes them into the tornado and vice versa.


Veteran
Achieve level 30 in Anarchy mode


You gain level progress over time - you'll start leveling up as you complete other achievements in this mode.


Environment Master
Perform every Anarchy environmental Skillshot


These are fairly easy, just kick an enemy into the required objects on each map:

Waterworks

• Green stuff falling from pipe
  
• Green stuff leading to the middle of the map

Grand Central

• Fountain
  
• Elevator shafts (then leash the elevator down)
  
• Rotating door
  
• Oncoming train (there's a sound ramping up before it comes past)

Dead Rock

• Dinosaur skeleton skull
  
• Tornado

Turbine

• Ceiling fan

Power Plant

• Grinder wheel

Junkyard

• Car crusher
  
• Waterfall

Heart Attack
Kill a Boss using the Hot Dog cart in the Hotel Elysium map


Bosses start coming in on wave 5, so you'll have to keep the cart alive until then. Just keep away from it so it doesn't get caught in the crossfire.
Once the boss has spawned, shoot them enough to kick or leash their helmet off, then lure them towards the cart. When they're near, shoot them to their knees again then kick the cart towards the boss - the cart won't blow up if you miss completely but make sure not to hit the wrong enemy.

Bell End
Kill 5 enemies at the same time using "Dung" in the Villa map


The Villa map has a large bell you can smash into the ground with your leash, killing nearby enemies. Stand nearby and lure at least 5 enemies before triggering the bell with your leash.


Extinguisher
In the Sewer map, kill 5 enemies in 1 wave by setting them on fire then extinguishing them

Use your leash on one of the valves to get the fire to start up. Stand right near the pool of water at the end, leash enemies toward you so light on fire, then kick them into the pool. You'll need to make sure you get both the Hot Flashes and Fish Food skillshots for each kill.
You can get this on any wave, but wave 3 is a good option since the shotgunners don't die immediately from the fire.


Environmentalist
In the Rock Quarry map kill an enemy using a Mine Cart, Oven, Fan, Smasher and Lava Cart in one wave

You can very easily find these objects in the map, there are plenty of enemies to get this on the first wave.


Like A Boss
Defeat a miniboss in Anarchy mode


There is a miniboss on wave 5 of most maps. You'll also need to kill one anyway for Heart Attack.


Beat 'em down
Kill every enemy in a wave using only the Teleportation in the Ulysses map


In the main room there are two large teleporters just out of bounds. For this just leash or kick enemies into these teleporters and make sure you get awarded the "Black Hole Fun" skillshot for each kill. It's easiest to get this on the first wave, so if you accidentally get a different kill, let the enemies murder you to restart the wave.


Barber
Kill an enemy by thumping them into a helicopter in the Mini City map


The helicopter flies around on this map, so you need to get the timing right on your thumper to launch an enemy into the helicopter blades. Try to get enemies to bunch up before you activate it so you have better chances.
You will need to wait until wave 2 or 3 at least to unlock the Thumper via the dropkit inbetween waves.