Though the degree of implementation has varied, customisation has been an integral part of gaming for several generations now. Our own Nick H. recently discussed the merits of creations tools and the potential for said utilities to extend a game’s life.
What is less common, however, is a title that mandates this ingenuity for basic plot progression. The Natsume-published Carnage Heart EXA seeks a level of devotion that will be off-putting to newcomers but strangely rewarding for those willing to study its intricacies.