Attack on Titan game is pretty much interesting with 10 different characters with special outfits which you can unlock and use while playing. The outfits are easy to unlock.If you keep playing you will unlock most of outfits which includes Cadet Core,Scout Regiment, No Jacket etc. when you want to change your outfit, select the Change Equipment option by putting game on pause. If you want to know how to unlock characters, follow the instructions we have given for each characters.
When mission “Roar” is completed, you can unlock the second outfit for Eren.
Then complete “Return To Trost District” to unlock third costume for Eren.
When mission “Return To Trost District” is completed, you can unlock the Scout Regiment costume for Mikasa.
If you complete mission “Rescue” another costume for Misaka will be unlocked.
When mission “Return To Trost District” is Completed the Scout Regiment costume will be unlocked for Armin
If you Complete the mission “Return To Trost District” the Scout Regiment costume will be unlocked for Jean
Complete the mission “Return To Trost District” to unlock the Scout Regiment costume for Conny
Complete the mission “Rescue” a costume for Christa will be unlocked.
Levi’s costume will be unlocked when you complete all missions in “A perfect job”.