Mindjack

I loaded the level called Panic Room (02-1) and got it pretty easy, you just have to make sure your a.i. partner takes out the gun bots. Also, i set the rules to glide time and set my arts to boost my health.

i was thinking, tho, that an easier solution would be to load a level with a lot of guys at the start and have a friend invade your game as a red hacker. They could just run to you so you can kill them.
As long as Wiess doesn't have anything stronger then a pistol you should be able to get the achievement pretty quick. this method sounds faster then what i did, but i haven't tried it.

To get this achievement, you need to kill 10 people in a row by punching / kicking them to death.

To do this:just keep pressing (note: not holding) B. I tapped / pressed B quickly about 3 times to get my guy to do one hit "sequence" or "cut scene" type thing. It took about 2 or 3 of the sequences to kill the person (when they kneel, they are dead).

10 times in a ROW, and you will have this achievement. Killing the knocked down / kneeling guys does not reset your streak.