Frag: doors

i just picked up a copy of Frag: Gold Edition and i'm wondering if the different color doorways mean anything? there's red, blue, and green and i didn't know if there was a mechanic to the game that effected the different colors.

thanks in advance.

[bonetm]

They do, if you have FTW, the expansion for Frag. You can see in the Frag page the rules for the expansion.

[PK]

Certain things, like the door colors and the grates on the floor, were put in with the notion that a future expansion could do something with them. So the colors and grates are nothing in Frag, but the expansion FTW adds keycards (which let you open a <foo> color door from the wrong side) and barrels (which are placed on the grates, and can be shot to explode them).