Instructions
Insert your "Call of Duty: World at War" game disc into your PlayStation 3. The console will load the game's main menu.
Select "Multiplayer."
Choose "Local" if you want to play a game offline or "PlayStation Network" if you want to play a game over the Internet.
Select "Create a Class." This is the screen that allows you to modify your "World at War" character. Select the "Primary Weapon" option and choose a gun from the list. Your character will use the selected gun in the game. Choose "Secondary Weapon" to choose a smaller gun your character will carry in game. Secondary weapons are typically things like pistols and knives.
Select the types of equipment, like frag grenades or tabun gas, from the "Equipment" menus. You can choose two pieces of equipment. Select the perks you want your character to use from the four "Perk" slots on screen. When you have modified your equipment selections, your character will carry the selected items into battle.