If you are playing coop with 2 people have 1 be anti-tank and the other medic. This way you have a good chance surviving most of the attacks.
Capture the flag
When your ally has captured the flag, fly very close to the carrier. If you press 'E' at the right time, he can get into the plane and then just fly him back.
Easy plane fly
When you fly a plane you have to use the mouse to aim your flight if you change the controls from using the mouse to using the directional-arrows instead.
Change spawn
Hit tilde (~) then type: aiCheats.code WalkingIsWayTooTiresome.
Destroy bots
Hit tilde (~) then type: aiCheats.code Jonathan.Gustavsson.
Enable AI
Hit tilde (~) then type: statistics aiCheats.code TheAllSeeingEyeOfTheAIProgammer.
Enable bot cheating
Hit tilde (~) then type: aiCheats.code BotsCanCheatToo.
Invincibility
Hit tilde (~) then type: aiCheats.code Tobias.Karlsson.
Kill bots that aren't enemies
Hit tilde (~) then type: aiCheats.code Thomas.Skoldenborg.
Kamikaze Car
A very VERY effective way of clearing enemy forces is by creating a Kamikaze Car. When you spawn, become an engineer, then using the Axis' jeeps, put all of your dynamite in the back seat of the jeep, (it will stay there while your driving, unless the car flips or you go up on down a steep incline) and drive it straight into the midst of the enemy forces. They will shoot the car and it will blow up with the added power of 4 or more sticks of dynamite, sometimes killing over 10 people.
Note: DO NOT use mines, once you start driving, they will blow up.
This only works properly will the Axis' jeeps, because they have large back seats and doors on them, if choose to Kamikaze in an Allied jeep the dynamite usually gets thrown out the doors.
Parachute Drop
When playing a LAN or Internet game, get into an airplane and instruct your friends to get onto the plane's wings. Get them to Crouch down, hold down the walk button and slowly walk forward when the plane is in motion, so that they don't fall off. Fly them over the enemy's territory, or more effectively, a crucial control point and tell them to let go of the buttons, and press jump (so that they don't hit the back wings) then parachute down to the ground safely and engage. Your friends can also attack shortly after putting their parachute up, so get them all to drop their grenades on the enemy, clearing their landing point.
This tactic is very effective at flanking or surrounding the enemy.