Bronze and Silver medals

[XRaptor77]

How to get bronze and silver medal? All I got is platinum or gold. Nothing more. And for example on fist level all I can get is platinum.

[Jarchow]

How to get bronze and silver medal? All I got is platinum or gold. Nothing more. And for example on fist level all I can get is platinum.

This post (http://forums.steampowered.com/forums/showpost.php?p=29852583&postcount=4) by the developer explains it all really. Just let the right amount of enemy cubemen through before building up your defenses to get those medals.

[XRaptor77]

Ah, it is based on % of lives. Ok, thnx.