The The Proving Grounds Add-on for Guacamelee! 2 has 7 achievements worth 185 gamerscore.
Visit the Mother Superior in the Coastal Town as Salvador
Wake up Tiempochtli
Grab and Throw 50 Enemies as Coscorrona in the Snake Temple
Kill 20 Exploders using Wall Fly while completing the Exploder Elimination Challenge
Achieve a Silver Medal for all of Tiempochtli’s Challenges
Achieve a Bronze Medal for all of Tiempochtli’s Challenges
Complete the Snakes in the Grass Challenge without taking damage