1. DONT CAMP
2. When someone is shooting you use objects to your advantage. E.G. If theres a bin jump over your opponent and knife them. *This can be hard and will take a lot of getting used to*
3. If your a sniper use acog scope.
4. Fire from hip because if your oppenent moves it will be easier to knife them.
5. Dont be stupid
6. Try using Stopping Power because this is a perk which raises your weapons power by APROXIMATELY 23%. It depends on your distance from your opponent because weapons with a short range still shoot really far they just lose power when you exceed the given limit.
7. Do knife kills
8. Throwing grenades far in front of you in maps like Bog and Countdown are great for clearing enemies on the other side. Even more so if you have the Fragx3. I can't count the number of times I've randomly killed players this way. It also pisses them off seeing that you just randomly tossed one into them.
9. Sway side to side if spotted by a sniper. it's harder for him to hit you, and you can unload for a possible kill.
10. Claymores in random places where traffic can pass through is a great way to rack up kills and prevent flanking.
11. Shoot the heli plus this is good for your accuracy on leaderboards.
12. In a middle of a mission press, X,X,X,O,SQUARE,X,O,TRIANGLE,X and then you will get a flame-thrower. i think
If you have anymore tips please post

This is a beginners guide btw when your more skilled you should be anticipating your enemies movements, knowing all the hidespots, trap spots, blah blah blah

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