Here is the full list of all 41 Arslan: The Warriors of Legend achievements.
Discovered a secret route.
Defeated Kharlan.
Synthesized a Skill Card for the first time.
Cleared the Battle of Atropatene.
Achieved a total of 1000 KOs using mounted attacks.
Achieved 1000 KOs in any scenario.
Achieved a 500 chain.
Achieved a 50000 chain during Mardān Rush.
Achieved an overall S Rank for the first time.
Activated a Unique Skill.
Activated a Special Move.
Activated a Chain Strike.
Cleared a scenario for the first time.
Activated Mardān Rush.
Acquired all other Trophies.
Collected all Recipe Books.
Achieved maximum Mastery for all weapons.
Acquired all Limited Skill Cards.
Acquired an S Rank for every Combat Mission in all scenarios other than the Tutorials.
Unlocked all playable characters.
Cleared all scenarios.
Regrouped with your companions in Peshawar.
Defeated Bahadur in the duel before the gods.
Cleared Story Mode.
Cleared an Extra Scenario for the first time.
Defeated Hilmes using Alfarīd.
Defeated Kharlan using Zandeh.
Cleared any scenario other than a Tutorial without taking any damage.
Cleared any scenario other than a Tutorial in 2 minutes or less.
Cleared any scenario other than a Tutorial on
Activated Mardān Rush with all characters.
Achieved a total of 10000 KOs using Mardān Rush.
Activated Mardān Rush a total of 200 times.
Activated 500 Chain Strikes.
Attacked using Azrael.
Reached the maximum level with a character for the first time.
Ate some cooking for the first time.
Achieved maximum Mastery with a weapon for the first time.
Sold a Skill Card for the first time.
Obtained a Limited Skill Card for the first time.
Cleared a scenario in Online Play or with 2 players.