A couple more things, including an ambient glow shader effect, some more item replacements, and menu options.

Damage Amplifier has been implemented. Armor items are being worked on. Powerups will come later, then I'll continue doing more weapons.

shaders/glsl/AmbientGlow.fp

@@ -0,0 +1,12 @@
+// imitation of the Unreal Engine 1.x ambient glow effect, timing may be off
+#define PI 3.14159265
+vec4 ProcessLight( vec4 color )
+{
+	float glow = (1.0+sin(timer*2*PI))*0.25;
+	return vec4(min(color.rgb+vec3(glow),1.0),color.a);
+}
+
+vec4 ProcessTexel()
+{
+	return getTexel(vTexCoord.st);
+}