Works great on iPhone 4

Like what everyone said, stunning graphics, immersive gameplay and all that.. But I took out one star because the content is very short lived.

By the time you get to stage 20ish, you will have maxed out all possible upgrades but the zombies keep getting stronger, rendering most of the weapons useless and forcing you to run away till the end of the stage. By stage 30, Ive decided to give up on this until further upgrade is made.

Aside from that, great game. I got a solid days play out of it.

Wiccan rede about Biofrenzy HD, v1.1