Mission 12 - Battle of Sunaion
Nearing the end of the level you will encounter 2 hunters and you will need to knock them off the map by having them swing at you (and miss) or hitting them with a spartan blast as they are very close to the edge. If you are playing solo, make sure that you order your teammates out of the area so that they don't shoot the hunters, but close enough that they can revive you just in case you're downed. Once near the hunters, run onto one of the side platforms to draw them closer to you and the edge of the large platform that they spawned on. Once one of them is close to the edge, drop down in between him and the edge and make him swing at you. Make sure you dash forward so that you don't get pushed off! If he is still on the map, quickly sprint and spartan charge him in order to stun him, and then position yourself in between him and the edge again until you're able to get him to fall off. After the first hutner dies, the 2nd will enrage and be invulnerable to spartan charge stuns. For this one, run back to where you came from and order you AI to push even further back. You are trying to draw the 2nd hunter to the frontside of the platform, and when it is close to the edge, quickly run forward and make him swing at you near the edge. If he misses, run back, refresh and try again. The melee recharge rate of the 2nd hunter is much longer than normally. When they both fall off, the achievement unlocks. If you die or one of the hunters dies, quickly reload the checkpoint.