Probably one of the first achievements you will unlock. Klose Kombat is when you grab an opponent or they grab you, the camera zooms in to both characters, and the fight turns into a temporary minigame of prediction. One character will be on the offensive, the other on the defensive. I think you get the achievement for being on either side, but to be safe, be on the offense side. To do so press the RB (Right Bumper) to initiate a grab motion. You need to be in right next to them to grab them. If done correctly, as mentioned above, the camera will zoom in on both fighters. You will get this achievement immediately when Klose Kombat begins.