The world used to be normal, but one day, everything changed. Strange portals opened up that were full of monsters. They soon got ranks:
E-Rank
D-Rank
C-Rank
B-Rank
A-Rank
S-Rank
Along with these ranks, people began to get there own "class" and level (the levels went from 0 to 99). The were: Tank, Beserker, Mage, Healer, Archer, and the legendary, Grimm. There were only 13 recorded cases of some being a Grimm, they all became people that went down in history. 9 were killed, 3 died of old age, and 1 retired. But one day, a child named Izuku Midoriya is born and he is found to be the most powerful of them all...
Season 4 of The Virus Within
Trinity is familiar with zombies, being one herself, but when strange zombies start appearing, she realizes that the world she knew might be changing yet again.
When a dangerous set of scientific notes are discovered, Trinity and her friends don't realize anything is wrong until a frantic radio call comes in. Unaware of the notes, they race to the south and struggle to determine where the strange zombies came from. The zombies are unlike any ranks previously seen, and they aren't as predictable. Some have new tricks hidden up sleeves, forcing any Stronghold they encounter to quickly adapt to the new challenge or risk being overrun. Secrets never remain hidden, and zombie apocalypses never make life easy.