It lacks a clipping, but the theme is good... The minimalist set of textures used completely smartly... To get some bonuses you must have some skills. There are actualy two secrets found by me. One hides couple of ammo boxes to get full army and the second one hides the strongest weapon - BFG. An ammobox for BFG is with that weapon. Download and try to find as many secrets as possible... It's something like Scavenger Hunt, but not really...