Most of the achievements for this game are self-explanatory but others are a bit hard to understand so here will be explanations for those and some tips to get them as well. If anyone feels like something is wrong, missing or not well explained just comment below and it will be fixed. Also feel free to suggest anything to add to the guide, any feedback will be appreciated. Hope this guide helps you on your way to 100%

This section will include the achievements that can be gotten on either the Spacemen or the Monster tutorial.

Equal Opportunity
Complete the Company's Non-Discriminatory Training Course.


This is the tutorial for the Spacemen.

Rip and Tear!
Complete the Monster Tutorial


Out to Launch [Secret]
Get blasted out of an Emergency Mass Ejector


In the Spacemen tutorial where the game explains you how to use the E.M.E., just hop inside. Also works on any other E.M.E. on Shapeshifter mode.

Camera Shy [Secret]
Shoot the camera in the Bias-Free Gun Range during the Spaceman Tutorial.


In the Spacemen tutorial when you reach the gun range there will be a pistol to shoot some targets as practice, just turn around and look at the wall. There will be a camera you need to shoot until it's broken.

This section will include the achievements related to the story mode.

Wharfage
Complete Chapter 1 of The Crumerian Saga - "Wharfage" on any difficulty.


The Core Labs
Complete Chapter 2 of The Crumerian Saga - "The Core Labs" on any difficulty.


The Speaker
Complete Chapter 3 of The Crumerian Saga - "The Speaker" on any difficulty.


Bone World
Complete Chapter 4 of The Crumerian Saga - "Bone World" on any difficulty.


Veteran
Complete any co-op Story Mission on Veteran difficulty.


The Mouth of Madness
Beat Co-op 3 "The Speaker" on Space Madness difficulty.


One strategy that worked for me was to rush to the doors ASAP, this way you wait as less as possible between the swarm of enemies. I played with 3 more players so if one dies, the rest can manage to survive until you get to a revival station. The enemies are infinite and the breaks between waves are way too short for you to be able to reach the end of each part. This will take a few tries because the map can be disorienting and sometimes is hard to find the right path, practising this map on an easier difficulty and learning where the good weapons spawn is good to know the map better.

High Five!
Reach Wave 5 in Survival Mode.


Ten to Win
Reach Wave 10 in Survival Mode.


Sweet Fifteen
Reach Wave 15 in Survival Mode.


Five to Life
Survive 5 waves without dying in Survival Mode.


Survival of the Fittest
Survive 10 waves without dying in Survival Mode.


King of the Ring
Survive 15 waves without dying in Survival Mode.


Keep in mind that these 3 achievements to survive without dying, doesn't mean that it has to be the first 5-10-15 waves, you can survive from wave 7 to wave 22 and you would get the achievement as well.

I KNEW IT!
In a game of 3 or more players, successfully mark the Monster as Suspicious.


A few minutes into a Shapeshifter round, a voting process will start. Make sure you vote the right one!

Just Borrowing
As a Spaceman, steal someone else's keycard.


Get close to another spaceman and steal their keycard (default key E).

Move!
In Shapeshifter, shove someone. Because you can.


Walk to another spaceman and shove them (default key V).

She Calls To You
Drink some non-dairy imitation-dairy chocolate-flavored space-milk.


Space-Milk is a feature that the profession "Cultist" has, just use it (default key 3).

Dibs!
In Shapeshifter, retrieve a Power Weapon from the canister before anyone else.


At the start of a round there will be a few locations with some good weapons, the locaation is marked with the weapon's icon and they're also marked in the map. Be the first one to get one of these.

Leaving On A Jet Shuttle
As a Spaceman, escape in the Rescue Shuttle.


The Rescue Shuttle arrives short after all tasks have been completed and it will land in any of the landing pads.

Not This Time
In Shapeshifter, as a Spaceman, destroy a Monster's egg.


The monster can lay eggs, just find one and shoot it.

This is the parasite egg, there is another type of egg that only the Acid Monster can lay.







Probing Questions
As a Spaceman, reveal the Monster with a health syringe.


While you're holding the syringe just get close to the monster while it's disguised as a spaceman and use on it, you'll know if it worked if the spaceman trasnforms back into the monster.

Come Out, Come Out...
As a Spaceman, knock the Monster out of shapeshift form with a well-placed Stun Grenade.

Throw a stun grenade right at the feet of the monster and blind him.

True Survivor
As a Spaceman, land the killing blow on the Monster.


Fightin' Words
In Shapeshifter, kill the Monster with a Shotgun.


Kill It With Fire!
In Shapeshifter, as a Spaceman, kill the Monster with any kind of fire.


A Flamethrower can be used for this achievement.

Rocket Man
In Shapeshifter, kill a Monster with a Rocket Launcher


Rocket Launchers will spawn on a Power Weapon Canister when the timer reaches minute 6, although there will be a notification at minute 7.

Faster Than Light
In Shapeshifter, kill a Void Beast (in Monster Form) with a Railgun.


Railguns spawn on Power Weapon Canisters when the timer reaches minute 12.

Unconvinced
As a Spaceman, kill the Monster while it's still in a shapeshifted form.


In a shapeshifted form means when the monster is still disguised as a spaceman.

Final Boarding Call
In Shapeshifter, as a Spaceman, kill the Monster while it's inside the Rescue Shuttle.


So far I've tried killing it with the doors of the Rescue Shuttle closed but probably with the doors opened also work.

Not So Fast!
Kill a Monster who has Posterior Claws, while they're in Monster Form.


Posterior Claws is a perk for the Monster. Apparently the Posterior Claws perk got removed from the game, use the Claws upon claws perk instead.

By Your Skin of His Teeth
In Shapeshifter, as a Spaceman, kill the Monster with less than 20 of your health remaining.


Good Guess
As a Spaceman, kill a disguised Monster from full health with a single blow. The Monster must die before you do.

The monster can be one-shot with a Grenade or a Rocket Launcher. This achievement can be earned at the same time with the next one.

PS: This achievement unlocks the cheese helmet as one of the devs mentions in this discussion.

Originally posted by Zag (Developer):

You have to unlock the achievement "Good Guess" to get the cheese helmet.

Good luck!

The Cask of Monsterado
In Shapeshifter, kill a Monster while it's inside a Vent.


For this you will need to find a grenade, then go to the vent where the monster is, walk close to it and just place the grenade on the vent (default key LMB). This will stick the grenade to the vent.

Doctor Assisted Monstrocide
In Shapeshifter, kill a Monster while they're locked into a Health Station.


Make sure to bring a strong weapon so it doesn't heal more than you can damage.

Not In Your Job Description
In Shapeshifter, as a Spaceman with the Janitor Perk, end up being the one who kills the Monster.

The Janitor perk is available after reaching level 12.

Participation Trophy
Be the first Spaceman to die, but Spacemen still win the round. (Requires at least 4 other players in the round).

SPACE MADNESS
Be the last Spaceman alive, in a game with 5 or more players.


Being the last one alive gives you a speed boost for tasks and other things, you will get this achievement as soon as you're the last one.

Access Granted
Unlock a door with VIP keycard


For this you will need to equip the VIP keycard perk and then simply unlock a door with it.

Spare Keycard
Have your keycard stolen, but you got a spare!


Similar to the previous achievement, you will have to equip the VIP keycard perk and let someone steal one of your keycards.

Take One And Call Me In The Morning
As a Doctor, drop a medkit that someone else uses.


The Doctor profession will have by default a medkit that you can drop (default key 3).

This section will include all the achievements related to playing as the Monster.

Do Not Crawl In The Vents [Secret]
You never listen.


As the monster just crawl in any vent.

Chomp!
In Shapeshifter, as the Monster, trap a Spaceman while burrowed.


In the monster form transform into a trap (Default key B) and then trap someone that walks over you (default key LMB), this skill is explained in the monster tutorial. This achievement can be achieved at the same time with the next one

I'll Take That
In Shapeshifter, as the Monster, steal a keycard while burrowed, by using your trap attack.

Using the explanation for the previous achievement you will get this one, just make sure the spaceman you're trapping has a keycard.

Key to a Spaceman's Heart
In Shapeshifter, eat 5 keycards in a single match.


Needs at least 3 players, with the spacemen having the Spare Keycard Perk equiped. Then just press G as the monster and click on Eat Keycard, then steal the keycards from the spacemen while in human form and repeat the process.

One Way Trip
As Monster, shove an unsuspecting Spaceman (player) into an Emergency Mass Ejector.

I'm The Real Yellow!
As the Monster, be disguised as someone else's color as they are murdered by their fellow Spacemen. (SECURITY does not count.)

Persuasive
As the Monster, kill a Spaceman with a weapon they were the last owner of. Grenades do not count.

Cutting It Close
In Shapeshifter, as the Monster in Monster Form, kill a Spaceman with less than 40 of your Monster health remaining.


Keep in mind that the monster's health is the bar a the top, not the red one, the red one is the monster health while in human form.






Silent But Deadly
In Shapeshifter, as the Monster, kill a Spaceman with a Toxic Ink Cloud.


Toxic Ink is a perk available at level 14, whenever you change form you will create a toxic cloud around you that will damage enemies that walk through it.

Second Base With Death
In Shapeshifter, as the Monster, kill a Spaceman using a parasite.


Normal eggs are parasites. You can lay eggs with R

Purrfect
In Shapeshifter, as the Monster, kill a Spaceman with an Acid Bomb.


These are the eggs that only the Acid Monster Perk can lay, available at level 11. They don't kill instantly so take down your target's health about half and make them walk to it.

Personal Bubble
As a Void Beast, kill a Spaceman with your claws.


Void Beast is a perk available at level 15.

Unleash the Beast!
As Monster, kill 3 Spacemen (players) with Monster Claws, in a single round.


It's not clear if only the last hit has to be done with claws or if you can't use any other attack so use only claws just in case.

Phantom of the Space Opera
As Monster in Shapeshifter, win a round with at least 3 murders, and without triggering the alarm on a Security Camera.

You can destroy the cameras or the security bots to make sure you don't get caught.

No One Gets Out Alive!
Win a round as the monster, with all Spacemen dead. Must be at least 3 other players in the match.

This achievement can be done with the previouse one if you're in a lobby of 4.

Room For One More?
In Shapeshifter, as the Monster, steal the Rescue Shuttle by destroying the cockpit door.

As the Monster you have to destroy the small door that leads to the cockpit on the upper level inside the Rescue Shuttle.

Mutually Assured Destruction
In Shapeshifter, as the Monster, deploy the Suitcase Nuke while onboard the Rescue Shuttle.

Suitcase Nuke appears on minute 2, it's the last weapon that spawns on a power weapon canister.

Dawn of the Walking Dead Space
Turn a Spaceman into a Zombie


The Corpse Lord mutation will allow the monster to put an egg that converts spacemen into zombies, just make sure to lower the victim's health a bit so the egg can get the kill.

Lunar Eclipse [Secret]
As a Shapeshifter, "accidentally" kill the Traitor.

This section will include all the achievements related to playing as the Traitor which in the achievement descriptions is referred as "agent of BRIGADE".

For The Homeworld
Win a game as an agent of BRIGADE.


As the traitor you have to win while being alive.

For The Greater Good
As an agent of BRIGADE, give your life for the cause and still win.


As the traitor you have to get killed and have the shapeshifter win.

Sower of Chaos
As an agent of BRIGADE, hack 20 different objects in a single match.


The traitor can hack things like doors around the map by using its keycard (default key N), just remember that they have to be 20 DIFFERENT doors and having the VIP Keycard perk equipped grants you a second keycard which allows you to hack twice as fast because after each hack there's a few seconds cooldown on each one.

The Most Convincing Son [Secret]
As an agent of BRIGADE, get killed by the Shapeshifter.


Missing The Point
Drink Space Milk as an agent of BRIGADE.


Similar to "She Calls To You" achievement but this time being the traitor.

This section will include all the achievements that don't fit on the previous sections

RTFM [Secret]
Read The Abridged Spaceman's Guide.


From the main menu, check top bar and click on How to Play then just read everything.

Lock and Load!
Create a perk loadout.


From the main menu again, click on Customization > Spaceman/Monster > Perks, then add all the perks and save the loadout.

Make Your Mark
Vandalize some Company property.


Join any game, mode or even the tutorial and use the spray on a wall or floor (default key T)

All Aboard! [Secret]
Using the Tram system, visit every station in a single match on Duress.


Just get on the tram and enjoy the trip, you will get the achievement once you visit all stations.

Dopefish [Secret]
Find the Dopefish in his natural, underwater habitat



This Dopefish is located in the H2O map. Just leave the station through any of the exit points marked on the map and go to the top left corner of the map.





Then find this huge rock and behind it you will find the Dopefish, you can see it on the picture, its the little thing on the left with the funny face.




Mind the Door! [Secret]
In Shapeshifter, close a door on yourself, dying in the process. Like a complete fool.


Doors deal 10dmg so make sure you’re less than 10hp when you lock a door on yourself. If regular doors don't work, then RVK mentioned the red water locks does the job but be careful not to fall into the water

WACKY WAVING INFLATABLE ARM FLAILING SPACEMAN [Secret]
Trigger an airlock trap with Magnetic Boots.


Equip the Magnetic Boots and activate an Airlock trap, you will not be sucked outside the ship because your boots sticks you to the ground.

Every Vote Counts
Make your voice heard by voting in The Tribunal.


In Shapeshifter, after a few minutes a voting proccess will start, just follow the light on the floor when it's about to start to get to the Tribunal room and vote.

Hunted [Secret]
You were marked as Suspicious in The Tribunal.


You don't have to be the monster, just be voted by the majority and you will be marked as suspicious.

Handyman 1 - Employee of the month
Become Employee of the Month! (Requires at least 3 other players in the round)


Get the MVP award at the end of a round in Shapeshifter.

Handyman 2 - High Value Employee
Become Employee of the Month with at least 3000 points. (Requires at least 3 other players in the round)

To get over 3k points, make sure to do most of the tasks. Picking up weapons from the power weapon canister and voting also give points. Killing the monster gives a lot of points too.

New Blood
Reach Spaceman Rank 2.


Rank 5
Reach Spaceman Rank 5.


Rank 10
Reach Spaceman Rank 10.


Rank 20
Reach Spaceman Rank 20.


Executive
Reach Spaceman Rank 30.


You can play shapeshifter and always be the mvp, then you can get over 4k points each match.

One easy but grindy way is by playing survival, the longer you survive the more points you get. In roughly 10 minutes you can rack up to around 2k points and its pretty easy to survive this long, so the more you survive the more xp you will get.

Another more grindy way is by playing story missions you get 1k exp for Recruit, 1.25k exp for Veteran and 2k exp for Space Madness but this last difficulty can be very hard to complete. Chapter 3 The Speaker on Recruit, this is the shortest chapter of all but you can get swarmed by enemies quite easily if you don't know the map, there are a lot of corridors that leads to nowhere. This chapter can be done in around 10 minutes by rushing the map but there is some talking with npcs at the beginning and end of the chapter so the gameplay actually is more like 7 minutes. Once mastering the map you might want to try it on higher difficulties for more exp per run.


The Only Good Bug Is A Dead Bug
Kill a total of 200 drones in a single level in Co-op or Survival mode. (Any Difficulty)


With more players there will be more enemies. On chapter 3 there are infinite waves of enemies.

You're Fired. [Secret]
You're supposed to stay alive, remember?

Originally posted by Zag (Developer):

That's an "achievement" for the greatest achievement of all: dying.

I'm not sure why it triggered so much later for you, though!

It basically means that you need to die. At some point you will get the achievement, apparently it doesn't unlock on your first death and it's also different for everyone, so be patient. You can see the discussion here.

As of the Update 1.5 - The Traitor! all achievements have gotten a new icon and some of them got their name or description updated and with the rework of how perk works now there might be some slight changes to how you get some achievements too. If there is any mispelling, wrong or outdated description, please let it be known on the comments so it can get fixed as soon as possible.

Thank you for reading and hopefully this guide was helpful for everyone, for any questions or suggestions please leave them on the comments and we'll talk about it ;)