I pick this game up on a random site and it turns out quite interesting. Vocaloid vs Zombie is a mod game based on our favourite tower defense game type, Plants vs Zombie. Now you can plant the Vocaloids and ward off a horde of zombies trying to invade your house.
The element of the game is still the same as the usual Plant vs Zombie so I guess the learning curve is short. But the cool thing is you will plant those cute vocaloids with special unique abilities that will help defend your house.
I have been a fan of Plant vs Zombie and this mod is certainly interesting. And fortunately, I have found the English version of this game. However, I don’t think you really need for type of game, would you?