Explainibrag: It's pretty much impossible to choose a 'best' kill because I'm always pulling off amazing shit in videogames like bashing 15 people in a row in original CoD without shooting at all as I clear Pavlov's house solo, backwards jump corkscrew rail gun blast someone in the face with both of us midair in Quake 2, going 165 kills for 1 death in Doom 2 deathmatch vs about 20 comp sci nerds during a in school LAN party because we convinced the substitute teacher that we were playtesting a game we made, leaping backwards off the ceiling at a weird angle as a runner in AvP2 to land across a giant room directly on top of an enemy killing them instantly.
If I had to pick one though it would be skimming the ground in a Zero on wake island Battlefield 1942. The enemy was waiting on their airfield for the respawn. At the one end of the airfield there is a cliff and I came in low to avoid any enemy fire then pulled up and skimmed right across the airfield at ground level. I hit 7 people as I went down it, killing them instantly as my plane ran right into them. The best was the guy who came over to the edge of the bluff I was swooping in from. I think he thought he was going to shoot me or something, I have to wonder at what point he actually realized that I was going to pull up higher from the ground. It all happened fast so maybe he didn't figure it out until he was already propeller food.
If I had to pick one though it would be skimming the ground in a Zero on wake island Battlefield 1942. The enemy was waiting on their airfield for the respawn. At the one end of the airfield there is a cliff and I came in low to avoid any enemy fire then pulled up and skimmed right across the airfield at ground level. I hit 7 people as I went down it, killing them instantly as my plane ran right into them. The best was the guy who came over to the edge of the bluff I was swooping in from. I think he thought he was going to shoot me or something, I have to wonder at what point he actually realized that I was going to pull up higher from the ground. It all happened fast so maybe he didn't figure it out until he was already propeller food.