One of the things i enjoyed in concrete jungle, was the fact that you had to be on high top buildings most of the time out of the human eye.
The cloak was a very important part of the game, and in order to sustain its power you had to drain energy from power sources to recharge the bateries which share its use with the plasma caster and some of his helmets visions.
You could also walk on the road invisible, but it would raise suspicions, and if you became visible in the middle of everyone it would rise such a panic that an elite division with choppers and bombs would try to kill you immediately, forcing you to back off hide and wear a cloak if you had energy to do it.
Even if predator could kill anyone in the game he was very killable by the AI as well, the game wasn't in first person camera either it was full character.
very good concepts, sadly a game full of bugs, but technology wasn't that great back in the day, if this game was reworked for PS4 it would be pretty damn awesome.