Hacker killed 4 of us outside Gorka at 11:50pm EST US time on official server 4403. Appeared to be using an antimaterial rifle, as on one of the deaths blood visibly shot 30ft into the air (video available). Final kill was on one of us prone inside a building, not showing, shot straight through the wall. All of the kills were suspicious as hell, but between watching my friend literally explode in a 30ft shower of blood, and the final kill on my buddy hiding not moving inside a building, killed by a single shot through the building, it was 100% a cheater.