Multiplayer Strategies:
Camping: you can camp, just make sure no one can sneak up behind you. Camping around a commonly used passage is a great idea. In addition, if you kill lots of people, then you can get more credits. This is useful in SWAT and Big Team Battle.
Infection: in infection, if you try to be the last man standing, don’t be in groups. Usually, groups are targeted by the “zombies” first. Try to hide in a place where nobody travels and crouch. If you crouch, you will not show up in the HUD. When you are the Last Man Standing, use your shotgun. Everyone else is a zombie and they are trying to get to you. your Magnum will not be sufficient. When you need to reload, run away when you reload because then everyone else is trying to get you. If you start out as the zombie, try to attack camping people from behind them. Always be on guard. After you infect one person, don’t celebrate, because other people might be around. Also, “gang up” on people. The one human won’t be able to hold off 3-4 zombies so try to attack in groups. Also, know the maps well, that way you know all the shortcuts to the map.