Fuga: Melodies of Steel

Fuga is set in a war-ravaged world where a village is destroyed by the fascist Berman Empire. Eleven surviving children band together after the attack and board a giant tank called the Taranis - a relic of an ancient but technologically advanced civilization - to traverse the dangerous landscape and rescue their trapped families. The Taranis houses a superweapon called the Soul Cannon, capable of wreaking massive destruction at the sacrifice of a crew member's life. The main characters must decide when and who to sacrifice in order for the group to reach its goal.