Uma ótima engine feita por jhalek90!
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A engine original pode ser encontrada aqui:
http://sandbox.yoyogames.com/games/25...
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A engine editada por "The Zombie Killer" que adiciona mais sangue pode ser encontrada aqui:
http://sandbox.yoyogames.com/games/18...

Looks like the Sandbox has been shutdown so I searched in the deepest parts of the internet to find this engine again, now is hosted by me, enjoy! http://migre.me/voPv3

Ps.: Foi usada no vídeo!

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Créditos a:
jhalek90
"The Zombie Killer"
gabrielsch
Jevin MacLeod http://incompetech.com/