An officer who reaches level 50 (the maximum level) will unlock his/her voice gallery.
Clearing Musou mode once with any officer will unlock Expert. Clearing Musou mode with at least one officer from all factions (Wei, Wu, Shu, and Unaffiliated/Other) will unlock Chaos difficulty.
Clearing Musou mode with one of the 17 officers who are available for that mode will unlock the CG movie player.
To unlock the character Lu Bu, complete Mussuo Mode with the following characters: Liu Bei, Cao Cao, Sun Jian, and Diao Chan.
Finish the mission targets to unlock new characters. This can be done in musou mode or free mode.
All the achievements are secret, but they are all relatively simple. Get the majority of the achievements by unlocking new officers (just complete mission targets on Easy or Normal) and by completing the Musou mode with each officer (on any difficulty).
Additionally, there are achievements for completing all the mission targets and clearing all the stages.
Clear Musou mode with all the available officers (solo or co-op doesn’t matter, but all the officers available in Musou mode need to clear it). Additionally, all officers need to attain level 50 (which effectively maxes out their skill trees).
