Here is the full list of all 44 Utawarerumono: Mask of Deception achievements.
On one map, defeated 10 enemies with 1 unit.
Defeated more than 300 enemy units.
Reached the max level for a unit.
Defeated the Tatari Unkami.
Defeated the Boro-Gigiri.
Unlocked all BGM.
Challenged Dream Match for the first time.
Unlocked all event visuals.
Witnessed the ending of the game.
"Vurai" completed.
"He Who Conquers" completed.
"The Rescue" completed.
Used a Final Strike.
"Shadows" completed.
"Mononofu" completed.
"Conflict" completed.
"Remnants and Remembrance" completed.
"The Prisoners" completed.
"Nakwan" completed.
Broke through enemy's ZOC.
"Vice and Virtue" completed.
Destroyed Moznu's axe.
"Forbidden Games" completed.
Successfully engaged in Critical 100 times.
Played Recollections.
Successfully executed a reactive Skill.
Equipped an item.
Spent a bonus point.
"Elopement" completed.
Accessed the Glossary.
"The First Mission" completed.
Used Action Chain on yourself.
"Bandits and Brigands" completed.
Stopped an enemy movement with ZOC.
"A Familiar Threat" completed.
"Extermination" completed.
Successfully executed an Action Chain.
"Test of Will" completed.
Took advantage of enemy's weak attribute.
Successfully executed a critical.
Watched the opening movie.
All trophies achieved.
Used Action Chain with all characters.
Used Final Strike with all characters.