Easy Blast Shield Pro...
	Gold Camo Weapon...
	Invisible turret location (cap...
	Multiplayer Unlockables...

To do this glitch throw a Concussion or Flash Grenade at the wall so it bounces back at you and stuns you. This will count as deflecting an explosion for the Blast Shield Pro. This only works with the unpatched version of the game.

When you reach level 31 in Multiplayer mode with a weapon by getting 1,000 kills with it the Gold camo version of that weapon will become unlocked.

This location works either way you could be in any teams red or blue team to place the turret.but the location is closest to the blue teams flag.
You know that truck that's open so you could go through it? (this place is in somewhere near the blue flags team,not red team). There a certain spot.go inside the opening and in the left hand corner place the turret there.and there it's invisible.if you look at your map,it shows that theres a turret but when in the main screen you can't see it.

When you reach the indicated level in Multiplayer mode the corresponding weapon, perk, equipment, or Killstreak/Deathstreak will become unlocked.

Level 5: Throwing Knife

Level 6: SCAR-L (Assault Rifle)

Level 8: SPAS-12 (Shotgun)

Level 10: P99 (Handgun)

Level 11: Blind Eye perk

Level 12: Dragunov (Sniper)

Level 13: Scrambler (Tactical)

Level 14: PKP Pecheneg (LMG)

Level 15: Hardline Perk

Level 15: Revenge (Death Streak)

Level 16: MP9 (Machine Pistol)

Level 18: CM901 (Assault Rifle)

Level 19: Sitrep Perk

Level 20: Specialist (Strike Package)

Level 21: EMP Grenade (Tactical)

Level 22: A550 (Sniper)

Level 22: Extreme Conditioning Perk

Level 24: Javelin (Launcher)

Level 26: AA-12 (Shotgun)

Level 27: Assassin Perk

Level 28: PP90M1 (SMG)

Level 29: Smoke Grenade (Tactical)

Level 30: MP412 (Handgun)

Level 30: Steady Aim Perk

Level 32: Type 95 (Assault Rifle)

Level 32: Final Stand (death streak)

Level 36: Skorpion (M. Pistol)

Level 37: Bouncing Betty (Anti Personnel Mine)

Level 38: P90 (SMG)

Level 39: Scavenger Perk

Level 40: Stinger (Launcher; Vehicle Lock-On Only)

Level 42: G36C (Assault Rifle)

Level 44: RSASS (Sniper)

Level 45: Trophy System (Deflects Enemy Explosives/Missiles)

Level 46: .44 Magnum (Handgun)

Level 47: Overkill Perk

Level 48: Striker (Shotgun)

Level 50: ACR 6.8 (Assault Rifle)

Level 51: Martyrdom (Death Streak)

Level 52: XM25 (Launcher)

Level 53: Claymore (Anti Personnel Mine)

Level 54: MK46 (LMG)

Level 55: Dead Silence Perk

Level 56: PM9 (SMG)

Level 57: Dead Man's Hand (Death Streak)

Level 58: Five Seven (Handgun)

Level 60: MK14 (Assault Rifle)

Level 61: Tactical Insertion (Marker to Place your Next Re-Spawn)

Level 62: Model 1887 (Shotgun)

Level 64: M320 GLM (Launcher)

Level 66: MSR (Sniper)

Level 68: AK-47 (Assault Rifle)

Level 69: C4 Explosives

Level 70: G18 (Machine Pistol)

Level 71: Hollow Points (Death Streak)

Level 72: M60E4 (LMG)

Level 74: MP7 (SMG)

Level 76: Desert Eagle (Handgun)

Level 77: Portable Radar (Shows Enemy Movement Within it's Radius)

Level 78: FAD (Assault Rifle)

Level 80: RPG-7 (Launcher)