Just beat the game today and I am only left with these two achievements asides from the co op ones. Looking for suggsetion as to where some good places that these can be done. I am going to go out on a limb here and assume that I will need to start a new game as I have cleared out all the outposts. After I beat the game I went back to the airfield and there were five guys left and for the life of me I could not get four of them together. One would always go off in one direction while the other three would follow me around. Out of frustration I killed one of the Rykats that nearly ran me over and they became hotstile. I looked for a group of them to see if I could get the Love The Boom achievement on them but could not find a group of four. So any suggestions would be greatly appreciated.