In the quieter areas you should hear birds chirping every time a Chameleon is nearby. This is muffled in areas with a lot of action. In those areas you should still hear load footsteps approaching you 2 or 3 seconds before a chamelon strikes. These footsteps are always accompanied by the screen shacking to let you know an attack is coming.
In the open areas Chameleons you are made aware of Chameleons being in the area by one them attacking one of your comrades in front of you. Still if you outrun your comrades then you can run right into them.
The audible cues seem to be giving some people trouble. Perhaps a longer fade in interval from a distance would have been better. The Chameleon could stay just as deadly but give it slightly more health since people could "see" it coming for a longer time and thus are apt to pump more bullets into it. Perhaps people are just too trained to take visual cues over audible cues.
In the open areas Chameleons you are made aware of Chameleons being in the area by one them attacking one of your comrades in front of you. Still if you outrun your comrades then you can run right into them.
The audible cues seem to be giving some people trouble. Perhaps a longer fade in interval from a distance would have been better. The Chameleon could stay just as deadly but give it slightly more health since people could "see" it coming for a longer time and thus are apt to pump more bullets into it. Perhaps people are just too trained to take visual cues over audible cues.