Full list of all 48 Guacamelee! 2 achievements worth 1,340 gamerscore. It takes around 15-20 hours to unlock all of the achievements in the base game.
The base game contains 36 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 12 achievements worth 340 Gamerscore.
Eagle Boost from 10 different hook points without touching the ground
Reach the good ending (collect all keys)
Beat the game on Hard mode
Defeat Salvador
Defeat Uay Pek a second time
Achieve 100% completion in all areas
Receive the Holy Hen's message
Lay a dozen eggs
Open the Golden Door
Defeat Jaguar(s)
Purchase all of the upgrades
Feed the hungry guard
Juggle an enemy with 6 Chicken Shots or Slides before it touches the ground.
Complete a secret Chicken Key Challenge
Defeat Cactuardo and Zope
Enter the Heart of Dankness... and return
Fully purchase one trainer's skill tree
Kill 1000 mean, nasty skeletons without families
Cleanse the Mexiverse of the vehicular menace
Open a loot box
Complete all of Flame Face's challenges
Find Juan and Lupita in the Darkest Timeline
Discover the Pollo Illuminati's headquarters
Defeat El Trio de la Montaña
One-shot an enemy with a fully upgraded super move
Defeat Uay Pek
Find 100% of the hidden items in a temple
Reach 150 on your hit-meter
Kill 50 enemies as chicken
Use all four of Coscorrona's special throws
Complete a Pollo challenge dungeon
Defeat El Muñeco
Defeat a Piñataface
Dodge 10 enemies' attacks by rollin
Regain the mask
Defeat Calaca
Defeat Salvador as Jaguar
Defeat a Giant Skeleton as Uay Pek's Head
Dodge then Hit 15 Enemies as Jaguar
Perform with the Dead Band at the Mariachi Club as El Muñeco
Defeat 25 Enemies in the Living World as Uay Pek
Grab and Throw 50 Enemies as Coscorrona in the Snake Temple
Visit the Mother Superior in the Coastal Town as Salvador
Complete the Snakes in the Grass Challenge without taking damage
Wake up Tiempochtli
Achieve a Bronze Medal for all of Tiempochtli’s Challenges
Achieve a Silver Medal for all of Tiempochtli’s Challenges
Kill 20 Exploders using Wall Fly while completing the Exploder Elimination Challenge