Postcards:Unlock the following postcards by performing the corresponding tasks:POSTCARD – HOW TO UNLOCKPacific Campaign – Win on all maps twice.Tour Of Duty I – Play 50 matches.Tour Of Duty II – Play 130 matches.The Best – Get the highest score in a match.Truly Elite -? Get 10,000 Kills.Melee Man – Get 20 melee kills.Master Of Your Domain – Get 17 kills with each class.Master Blaster – Kill 50 enemies with grenades, rifle grenades, or explosives.Rifleman – Kill 50 enemies with the semi-automatic rifle.Infantryman – Kill 50 enemies with the sub-machine gun.Sniper! – Kill 50 enemies with the scoped rifle.Motorman – Get 25 kills with a car, tank, and plane.Parachutist – Use the parachute four times.Milkrun -? Fly a plane for 20 minutes.Bomb Run -? Launch an air raid killing and kill one enemy.Wheelman – Get 50 kills with a car, tank, or boat.Fighter Ace – Get 50 kills with fighter planes.Defender – Defend 20 flags.Attacker – Capture 30 flags.Veteran – Capture 50 enemy flags.Lifer – Reach the top rank.Squad Assister – Get 100 squad assists.Squad Avenger – Avenge 100 squad members.Best Squad – Be in the best squad three times on all maps.Stamps:Unlock the following stamps by performing the corresponding tasks:STAMP – HOW TO UNLOCKKnife Efficiency – Kill four players with melee weapons.Explosives Efficiency – Kill four enemies with grenades or explosives.AT Efficiency – Kill four vehicles with the recoilless rifle.Rifle Grenade Efficiency – Kill four enemies with rifle grenades.Pistol Efficiency – Kill four enemies with the pistol.Rifle Efficiency – Kill four enemies with the semi-automatic rifle.SMG Efficiency – Kill four enemies with the submachine gun.Sniper Efficiency -? Kill four enemies with the scoped rifle.Vehicle Efficiency – Destroy six vehicles in any fashion.Jeep Efficiency – Get four kills with a car.Tank Efficiency – Get four kills with a tank.Plane Efficiency – Get five kills with a fighter plane.Boat Efficiency – Get two kills with a landing craft.HMG Efficiency – Get four kills with a heavy machine gun.Air Defense Efficiency -? Kill two planes with an anti aircraft gun.Bombing Efficiency -? Kill four enemies with air raids.Air Superiority – Shoot down three bombers.Vehicle Assist Efficiency – Get five vehicle assist kills.Leatherneck – Kill 20 enemies.Defender Efficiency – Defend five flags.Attacker Efficiency – Capture five enemy flags.Best Squad – Be the best squad of the round.Teamplayer – Get 10 squad assists.Squad Excellence – Each squad member gets any one stamp and kills 10 enemies.Sandcastle locations:Find a hidden sandcastle in each of the following locations:Guadalcanal: On the bigger of the two islands there is a beach facing Guadalcanal and two trees. Follow the beach to the left of the trees to find a sandcastle and shovel.Iwo Jima: On the island closest to the carrier is a sandcastle which faces the carrier.Wake Island: By the beach base are two small islands. On the island to the right is a sandcastle with a swedish flag and yellow shovel.Repairing tips:To repair a plane, land it on a landing pad or ship.To repair a tank, drive into the spawn huts in Guadalcanal or Iwo Jima. They must be controlled by your team.To repair any vehicle, have infantry use the wrench.Squads:Join a squad and you will spawn next to them rather than spawning all the way back at the base.Bombing runs:When performing a bombing run, keep checking the mini-map to see all enemies. Any enemies standing outside the shelter will appear there. Although you may miss bombing a few enemies grouped together at their base, it is better to kill campers outside the air raid hut.Capturing bases:After spawning, fly a plane directly to an airfield base. Parachute out and immediately capture that base. This will allow your team to spawn at the strongest point and also unlocks the bombing run, tanks, and another plane.How to detect attackers:All empty vehicles will appear on the map. When boats suddenly appear around the base you are defending, it will alert you when attackers are there.Easy kills:You usually will not get points when using a sniper from within your spawn point. However, the anti-aircraft area on aircraft carriers are not treated the same way. You can remain in the gun area and get points. This is especially useful on Iwo Jima when attacking the Lighthouse or Beach.Faster reloads:Press [Reload], immediately sprint a few steps, then press [Reload] again.