Full list of all 77 Brigand: Oaxaca achievements.
The base game contains 66 achievements, and there are 3 DLC packs containing 11 achievements.
Kill Mr. Cooper
Beat the Squirrel challenge map
Beat the Nightmare DLC
Beat the Nightmare DLC with max score on Badass difficulty
Kill the Creeper in Nightmare or Battles DLC
Take Loma Larga back from kalfu in Battles DLC
Escape the jungle in Battles DLC
Defeat the invading Ronin in Battles DLC
Defend at least 4 of Echo's brew tanks in Battles DLC
Help Mabel's ascension in Battles DLC
Transmit neuro map in Battles DLC