User blog:Negabandit86/Found Something Slightly Interesting...

http://tvtropes.org/pmwiki/pmwiki.php/Main/CombatArms

"Easter Egg: At one point, delving into some of the games files and looking into some user configuration text files revealed some leftover bits including such variables as "vehicle turn speed" and "toggle night vision." While the night vision was actually teased (before it was changed) by a loading screen for the map Rattlesnake with a picture of a merc using a pair of goggles with a pistol drawn, none of it never came to be. In subsequent updates, the variables were removed."

Vehicle Turn Speed and Toggle Night Vision. Heh.