Ever playing Xbox Live/Splitscreen, but someone ALWAYS knows you're coming? Well, with these tips, become the Sam Fisher of the 40's!
OK, this can be applied for all games but I will break it down into sections:
Team/Deathmatch:
Ok, start simple. Ever tried to kill someone but they heard you walking? Well, when you get moderately close, crouch down to lose the noise. Your footsteps cannot be heard. Laying down is good, but you can be killed easier. Crouch, walk right behind them and BAM! Melee or shoot in head. Use pistol for head shot just to be cool

HQ(Head Quarters):
Ok, HQ. When capturing a HQ, get close to establish it but stay out of view. Then, establish hide, and wait for poor suckers to come. I reccomend the M1 Garand for Americans, PPSh or PPs42 for Russian, and M1 Garand again for British, and MP44 for German. Let them come and grenade them and BANG! BAM BAM BAM! POW POW! BOOM! They're dead. Hopefully it won't take you that many shots

CTF(Capture The Flag)
The classic. Ok, simple: Sneak close, and this is the most importaint thing-check your surrounding BEFORE going for the flag. More people die from this than any other way. Make sure the area is clear, then get the flag. If the environment is clear, walk with pistol to go faster. If not, walk with main weapon.
S&D(Search and Destroy)
My favorite game mode. This is similair to HQ. Well, this is my best strategy I am about so share with you. You heard it from me first!
Well, have half the team go to A for example, but the other half go to B. Have one of them act like they want to plant the explosive, but let the other ones plant. This always confuses enemies because they don't know which one they are planting at! Well, plant that sucker and hide. You mst defend it for 1 minute, then it blows up and you get a point. Use this startegy wisely, kemosabi. BIG NOTE: DO NOT stand next to the explosive when it goes off after 1 minute. I did that once and it blew up and I died

Use these tips and straategies wisely, fellow Call of Dutiers!