GC = conquet/domination style.
3 flags. capping flags progresses a bar for your team.
first bar to reach max wins the round.
if you win a round, the next set of 'flags' is pushed back behind the enemy, so the enemy have to retreat.
if you lose a round, the objectives move to behind you and you have to fall back.
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BC = if you get a certain number of kills, you become a 'threat'. your threat level increases as you kill more and more people. because you are the 'threat' the AI 'Battle Commander' assigns players on the enemy team to kill you.
if enemies are sent to kill you, they get a large radius which represents your last known general area. and a HUD symbol of where you were last seen exactly. it doesnt track you though, only the area you were last seen in.
as the threat level increases, more people are sent to kill you, until everyone is after you (at 5* threat). but you also get awesome buffs to help you stay alive, such as UAV scan and Flak Jacket. also, you get a full ammo resupply each start level.
if you are using vehicles, the same applies, except you get vehicle perks and full repairs at each threat level. if you kill a 'threat' on the other team you get extra BP. the higher the threat, the more BP bonus you get.
camping = no no. since last location is visible, you'll get BP hungry enemies coming to get you in no time