Creation of a convenient and intuitive user interface requires solid knowledge of usability basics and immediate availability of high-quality graphic materials and art....

Kagura and Saaya are schoolgirl sisters raised together by the Vampiric Clan, and rank among their strongest warriors. Aya and Saki are assassin sisters descended from the rival Baneful Bloodline, and represent their lineage with esteem. Now, these four must learn to fight together against an undead army. Brought under one banner known as the “Zombie Punitive Force,” these blood enemies will...