Here is the full list of all 25 ZONE OF THE ENDERS The 2nd Runner: M∀RS / ANUBIS ZONE OF THE ENDERS: M∀RS achievements.
Defeat Aumaan Anubis
Defeat Anubis
Acquire Jehuty Ver. 2
Defeat Zakat
Defeat Inhert
Defeat an enemy by using the shafts at Fort City (Pinch the enemy using the Shafts)
Defeat the Viola AI for the final time
Defeat the train in less than 5 minutes
Defeat Vic Viper (Leo)
Find Taper in less than 4 guesses
Win your first encounter against the Viola AI
Complete all of the in-game tutorials
Defeat Ardjet
Acquire Jehuty
Collect all achievements
Beat the game with a ranking of S
Beat the game with a ranking of A
After the initial Vic Viper battle, defeat all of the Naritas in under 90 seconds
Defeat the 5 BAHRAM Battleships in less than 6 minutes
Earn a Ranking of SS at Vascilia Battle
Earn a Ranking of SS at Aumaan Crevasse
Find all 20 Ex-Missions
Clear Zoradius
Unlock all the frames
Reveal Ken's alternate outfit