CATS person: Achievement PSN of Ruiner

Make sure you obtain all CATS each time you return to Rengkok, you just need to hack the CATS, the caches themselves do not need to be found.

The CATS are littered throughout the town, most tend to be hidden on the roof tops, so look for stairs.

You cannot use level select to repeat this as it occurs over the 3 times you return to Rengkok.