Hints & Tips for Killzone 3 make sure you read this !!!!!!!!!

Make sure you listen to when a player gets Melee'd the HiG's & ISA both sound different when dyeing.
Snipers when cloaked jam your radar the closer you get to them when he has fully unlocked his class abilities put your crosshairs on him if it turns red & ID will show.
Infiltrator when in disguise can be filtered by your mini map in one way or another of put your crosshairs on him if it turns red he is a foe.
When placing C4 there are ways to plant it with out having it flash it's beacon marker color.

Faster reload ribbon is from hip-fire
Faster aiming ribbon is from aiming done your sights
Increased bullet ribbon is from damage is from assists
Increased accuracy ribbon is from 5 Melee's
Double XP ribbon is from you personally completing mission objectives

Play your character class to it's max potential learn all the kinks & quarks to you favorite class & revive, repair, take spawn points, call air support, drop sentry turrets, Spot & mark ex-cetera ..........

Try different X & Y axis settings for your controller, the default setting is, X 30%, Y 30%. If you set the X higher than the Y, you'll find that you can turn quicker without the gun flying upwards, my setting is X 50%, Y 20%, works really well.