You must play Multiplayer and get experience to "Level Up" and after a certain amount of level ups you can unlock new weapons for kits.
The Battlefield stage is accessible in Super Smash Flash after you clear All-Star Mode as any character.
Go up levels
you cant there are just the primary weapons you have and find until you die
Operating on battlefields dominated by more lethal high-precision weapons.
Sorry But NO
Battlefield 3 does have Co-op mode, you can also unlock weapons for use in Multiplayer from playing Co-op.
-aw3somef1rep0wer will unlock the USAS12 Shotgun in multiplayer. That's the only cheat to unlock weapons (that I know of).
You must play Multiplayer and get experience to "Level Up" and after a certain amount of level ups you can unlock new weapons for kits.
The last unlock for every class is the other teams weapon for that class.
There are no claymores in Battlefield Bad Company 2, but they have C4 and anti-tank mines.
In Battlefield 3 online multiplayer, the player can unlock weapons and other gadets by gaining points. The "C-4 Explosives" unlock for the Support class is unlocked by gaining 4000 score as the Support class.
do the missions
The Battlefield 3 game pack, Back to Karkand was release on PlayStation 3 on the 6th of December, 2011 and one week later on the 13th of December for Microsoft Windows and Xbox 360. The game pack includes four maps from Battlefield 2 re-created in Frostbite 2; Gulf of Omen, Wake Island, Strike at Karkand and Sharqi Peninsula, ten weapons and three vehicles from Battlefield 2, as well as a new vehicle, a new game mode; Conquest Assault and assignment challenges to unlock the new weapons.
You unlock the revolver after achieving level 28.
There are 2 expansions. Road to Rome and Secret Weapons.
You don't do missions to unlock weapons you unlock weapons by leveling up.