Naughty Bear

The solution assuring you this is time consuming and is best achieved with stealth isn't exactly right. You COULD do it this way,and you COULD waste your time, but it's far easier to try something along these lines:

- At the beginning of every area pick up bear traps and booby trap the key routes. The AI follows a fixed path and so natural choke points occur where the paths become narrow.
- Then head around and sabotage some key objects nearby to where the majority of the B.E.A.R's are located.
- As soon as one attempts a repair or is trapped, context kill them with RT.
- Always pick up the trap and rearm it immediately. Chances are a bear will use the AI path again, or bear's will come flocking to your position.

A couple of sidenotes about this achievement:

- A kill IN a trap will count. Killing a bear who is HELPING a friend in a trap will NOT count as an object kill and will forfeit this achievement.
- When bears are making repairs, they ocassionally drop down on the floor to pick up something they've dropped. Killing them at this point (resulting in a neck breaker animation) will NOT count towards this achievement as the object remains intact and does not come in to play.


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This can be a very time consuming achievement to go for as far as time doing nothing goes.
The trick is the words 'Object kills' and what it entails. This means no weapons obviously but does allow traps. Mainly what it means is killing a bear while they are in the repair proccess on something.
First up I am going to say don't attempt this without a costume that allows you to walk unnoticed by the other bears. Kudos to you if you can do it without it but I see no other way.
What you need to do is make sure you play this as a stealth mission, anything you do make sure no other bears are around to watch so as to not alert them of your doings. The best trick is to sabotage single items away from the group, for example in a room full of toilets only break one so as to not have 4 bears in there at once all repairing and you unable to kill. From here slowly pick them off with RT using your Ultra Kill while they are repairing said objects.
In some areas, such as the 1st one you will find that the bears may all gather around the one tiny house making it hard for you to do anything, the best trick hear is to lure them out, alone if possible, by firing gun shots (with an unsilenced pistol) or smashing windows. A good placement of a trap will ensure you snare the bear and have an easy kill.
In most housing areas the best place to leave for the one or two stragelers who will be less inclined to repair is to leave the toilets to sabotage till then. Most bears will be more inclined to repair a broken toilet/electrical box over an arcade machine for obvious reasons, this then becomes the prefect bait. Other than this the best thing you can do is sabotage everything, they can only resist so long, but it can mean a long wait.
Halfway through you will come across Naughty's Hut with two bears and only two objects and one trap. Sabotage both of them and hope that they fix both, otherwise I garuntee one will be unable to resist fixing the toilet and then just trap and snap the other.
With all these little tips you should be able to have this in one run, just be very patient as it can take a while.