lol heads up, when i first started playing multiplayer i was like wtf is dis. new stuff makes it a bit confusing. also if you played black ops and are use to the three shots and your dead thing now its like one and a half. so yea insta kill. just so if you guys were wondering ( this isnt a spoiler) your character level unlocks guns and perks while the level of your gun unlocks the attachments for that gun only. in order to level your gun up you gotta kill with it, same goes for your secondary weapon, you cant have it in the class and expect it to level up too. perk pros are the same as anything else complete the mission. this will help you so you dont waist like 5 games trying to figure this out.. there are two types of killstreak rewards. the support killstreaks do not require you to get like 3 kills for a uav or something, they are based off assist points and objective points. so even if you die you can still get those streaks (might as well call them point streaks). and the assault option is just like regular killstreaking kill without dying. make sure you click the type of kill streak you want. ill let you find out about prestige. o yea when you level your gun you get perks for it that dont count as the perks your using like slight of hand and stuff. this is a special perk which can reduce recoil add 2 attachments to your weapon ect. they even have a option of letting you have perks as killstreak rewards. so like you get three kills and now u get the slight of hand perk. i havent gotten all the kill streaks yet but they arent hard to figure out how to use. one last thing. the spawning system is gay, when you spawn the other players will be about a short sprint away. good luck.