The way most first player shooters score kills is simple to understand, but the harder is to make the kill the more points you get. That meaning if you kill someone with a knife you will get more points then someone using a chain gun, but you are extremely skilled at the game, you can run around with just your knife out is a big gamble. This method of play will make you the biggest loser.
Another way that makes a higher score is to work as a team with other players, many people are playing by yourself, with the goal of running around killing everything that move. If you and some friends are playing, you can use the other as in actual combat. Now that you have other people to see the back of the unit, which may be the killer, the more powerful in the game for example of this is that in some parts of the game, the strength of the delta that you can use a helicopter. And if your friend is a steering wheel. And other weapons to the human chain and can cover large areas and decide on a plan before you start the game, you can develop a good strategy as a professional player.
Many times, I would jump on the driver's seat and the other players have increased in and around the enemy camp, but players in the back of a hack, I would not attack. However they will jump out or just wait for me to attack the ground instead of sky, so instead of helping to increase our chance of winning just need to work together as a team. This will reduce the chances of our team to win the game. A good strategy to play as a team and use all available at your disposal is not only possible to win more games and get more points you'll have to play better online. And this led to a first person shooter games.