There are 63 Steam achievements in Brigador, each with unlock criteria.

Welcome, Brigador.

Complete Turn It Out in Campaign mode.

Das Ist Eine Statistik

Kill 10,000 civilians.
"This is a statistic" in German.

Corvid Claret

Kill 1,000 Corvids.
According to Beynder's acquisition entry on hulls, Corvid non-explosive reactive armor allows for overpenetration of incoming fire, preserving the vehicle for salvage and reuse (at the expense of the crew). The term "Corvid Claret" - a reference to Saint Anthony Mary Claret - is frequently cited in NEP psych reports, and alludes to the sighting of these "resurrecting" foes.

Dirt Eater's Revenge

Kill 1,000 Spacers.
Spacers refer to other peoples as Dirt Eaters, as well as Cattle-Races, Ground Dwellers and Ground Crawlers

Radio Free Solo Nobre

Kill 1,000 Loyalists.
"Radio Free" is a prefix to US CIA-funded stations in strategically important countries.

SteamAchievement-Not One Stone
Not One Stone

Cause $10,000,000 worth of property damage.

Ye Dragons and All Deeps

Complete a Freelance operation with The Auditor.
Excerpt from 148:7 (King James Bible) - "Praise the LORD from the earth, ye dragons, and all deeps".

Animal Found Toast

Unlock Kennedy Spits in Acquisitions
Title from the lyrics in the song Iron Galaxy, by hiphop/rap duo Cannibal Ox.

Through a Scanner

Unlock Oscar Allard in Acquisitions
May be a reference to the Phillip K. Dick novel A Scanner Darkly, which in turn refers to Corinthians 13:12 "For now we see through a glass, darkly".

L'Inconnu de Solo Nobre

Unlock Precursor James in Acquisitions
"L'Inconnu" is french for "The Unknown".

Manu Propria

Unlock Cephei Chatfield in Acquisitions
Manu Propria is an antiquated way of signing manuscripts and letters, meaning "by one's own hand" in Latin.

No Plan Survives

Unlock all Special weapons in Acquisitions.
"No plan survives first contact with the enemy" is a military truism, codified by Prussian Field Marshall Helmuth von Moltke.

Olive Drab Everything

Unlock all Loyalist vehicles in Acquisitions
Olive drab was the colour of the standard fighting uniform for U.S. soldiers and military vehicles during World War II.

Blue In Green

Unlock all Corvid vehicles in Acquisitions.
Blue In Green is a song by Miles Davis.

My Red Hot Car

Unlock all Spacer vehicles in Acquisitions.
My Red Hot Car is a song by Squarepusher.

Lore Boar Wants More

Unlock all LORE entries in Acquisitions.
References a tweet from Gausswerks about the Brigador Wiki

Unaware of Any Such Activity

Unlock all INTEL entries in Acquisitions.

Just Deserts

Unlock all Heavy weapons in Acquisitions.
Just Deserts is an expression for due punishment or reward.

This Is What You Want, This Is What You Get

Complete The Order of Death in Campaign mode.
A reference to the Public Image Ltd. song The Order of Death, which shares the name of the mission to be completed. Also used in the 1990 science-fiction horror film Hardware.

Find Your Exit

Complete all levels in Campaign mode.

Diamond Collector

Complete every Campaign level with all loadouts. 

Blood Money

Complete Knife Chase in less than 15 seconds.

SteamAchievement-Rock Over Solo Nobre
Rock Over Solo Nobre

Complete Joy Bus/Hell Ride without firing a shot.

Double Stack

Complete a Freelance operation with 2 of the same weapon equipped.

SteamAchievement-Hell in a Two-Stroke
Hell in a Two-Stroke

Complete a Freelance operation with the Varlet.

Cult of the Founder

Complete a Freelance operation with Precursor James.
Precursor James' role in the colonization of Novo Solo - if any - is yet to be known.

To The Letter

Complete a Freelance operation by completing 100% of the objectives.

In Camera

Complete a 3+ run with no alarms.

So It Goes

Complete an operation with a Rat King equipped with 2x Königs and Audio-Kinetic Pulse.

Steady Ed

Complete an operation with a Touro equipped with Balão, Bully, and Smoke Projector.
Blake's nickname. From the Brigador Audiobook, chapter 1: "Captain Edwina Blake was uncharacteristically nervous. Nothing usually rocked Steady Ed, not on the surface at least, and today it'd been no exception, until now."

Called It What It Truly Was

Complete an operation with a Buckmaster equipped with Zeus, Bonesaw, and Active Camo.
Excerpt from the Brigador Audiobook, chapter 1: "The Buckmaster, a marvel of engineering, is the only scout mech chassis able to mount such a heavy weapon. He thought the Buckmaster deserved a better name, so he called it what it truly was: a hunter. Specialist Hugh Armbruster loved his mech."

Sleeping Lessons

Complete an operation with a Sleepwalker equipped with Disco, Black Hand, and Active Camo.

SteamAchievement-Ranulph's Revenge
Ranulph's Revenge

Complete an operation with a Mongoose equipped with Carlos, Bonesaw, and Smoke Projector.
Ranulph is one of the main characters in the Brigador Audiobook, who pilots a Mongoose.

The Gonk

Complete an operation with a Lowmil equipped with Otomo, Chieftain, and Smoke Projector.

Wolf Like Me

Complete an operation with a Haseki equipped with 2x Jericho and EMP.

SteamAchievement-Technical Excellence
Technical Excellence

Complete an operation with a Nickel equipped with 2x Crambo and Smoke Projector

When I'm On The Road, I'm Indestructible

Complete an operation with a Troubadour equipped with Belter, Carlos, and Active Camo.
Reference to the adventure videogame Full Throttle.

SteamAchievement-Tuk Tuk Boom
Tuk Tuk Boom

Complete an operation with a Varlet equipped with 2x Donkey and Audio-Kinetic Pulse.

Maschinen Krieger

Complete an operation with a Kettle equipped with Harvester, Thunderclap, and Smoke Projector.
Maschinen Krieger means "Machine Warrior" in German.

Tractor Pull

Complete an operation with a Roper equipped with Kraken, Bishop, and Smoke Projector.

SteamAchievement-The Tenderizer
The Tenderizer

Complete an operation with a Vex, 2x Banshee, and Active Camo.

'Giancarlo' Jr.
'Giancarlo' Jr.

Complete an operation with a Rope Kid equipped with Bully, Pinch, and Audio-Kinetic Pulse.
In the Campaign mission Suicide Machines, 'Giancarlo' rides a rope kid with similar armament, but with a Donkey cannon rather than a Pinch rocket launcher.

Mark It Zero

Complete an operation with the The Pompadour equipped with Archie, Gutterball, and EMP.
As the Gutterball shot is compared to a bowling ball, the title is a reference to this scene in the film wp:The Big Lebowski.

What's This, Then?

Open the developer console.
Pressing the grave accent ("`") key opens up the Developer Console. Source games use the tilde ("~") key to open them.

Original Contract Pt. 2

Complete a level at 100% speed.

Slo-Mo Inhaler

Complete a level at 50% speed.
References the drug Slo-Mo from the 2012 movie Dredd