Game bugged up... it look like some of the zombies froze but I could still shoot them but didn't get anything (like they weren't there)... this continued for a few waves until they just stopped spawning even after the wave meter filed!
The game became extremely repetitive after a while (same bosses... same enemies). Also the dialogue had way too much pointless text and most of it was cliche.
Kind of takes the point out of Epic Battle Fantasy... you don't start off epic anymore and now you have to waste your time gaining exp and leveling skills up?