This is some multi- and single-player tactics you can use (mostly multi) in RB6. This is, I think, the largest tactics page available. Please note that this site is literally HUGE, so it will probably take a while to load, but I promise that it will be worth it!
General tips
Never, never ever run out into
an open area
Always try to stay in a
spot where you can not be visible from behind
Stay low
Do what your opponent
least except you to do
To beat your enemy, you have to know
your enemy
Try to think like your enemy
Know your maps
Plan ahead
Recognise chokepoints
Don't walk in front of your buddies
Specific tips
Crouching
Doors
Doors - shooting open
Door charges
Extra ammo
Frags & Flashbangs
Heartbeat Sensor (HBS)
Map display
Movement
Reloading
Shot selection
Weapons
General tips
Never, never ever run out into an open area! This will not only make yourself visible to the enemy, but you will also get an area which you won't be able to cover at the same time. This might sound very basic to you, but I have seen too many people forget this to not to let it be here.
Always try to stay in a spot where you can not be visible from behind, and still get a good look over the battlefield. If you can't find a small spot like this, try to find a room with only one door. Then stay in the dooropening. Though it is not good if you get out too much. That will only make you more visible than necessary.
Stay low! In outdoor levels like Airport, Road Ambush etc. It is essential that you stay low! In these levels, especially Road Ambush, stick close to a wall or something big. It is always easier for the enemy to see you if you run in an open area with no objects to hide yourself behind.
Do what your opponent least except you to do. Unless you play against some real newbies, your opponent thinks that he is smarter than you are, and stuff like that. Therefore, do what seems so simple that it is (almost) stupid. You see, your opponent usually, not always, underestimates you. This is the worst mistake you can ever do in combat. And the most common one.
To beat your enemy, you have to know your enemy! Analyse which tactic he uses. Is he the guy who lies and wait for you or maybe the one that goes around you and kill you from behind? This is often the missing link between failure and success.
Try to think like your enemy. Think like "if I were him, what would I do next?". This will give you a great advantage if you do it successfully. Unfortunately this often require that the enemy is a good friend of yours, or at least someone that you have played a lot with.
Know your maps. If you're playing a map for the first time, you are at a disadvantage to players who know it better. Make sure you've played all the missions in single player a few times, and try to remember the layout of the maps to memory.
Plan ahead. As the game is loading, think in terms of what you are going to do. If you have time, discuss generally with other players on your team what strategies you should employ, whether you're going to stick together, split up, cover specific entrances, etc.
Recognise chokepoints. There are places in each map where enemy and friendly forces are destined to meet. Keep these points in mind, and think ahead for where you want to be when the moment of confrontation arises.
Don't walk in front of your buddies. Typically, they will be aiming at something, and if you walk in front of them, you stand a good chance of getting shot. That said, don't hog the space in an area; leave some space behind you for buddies to get by you, and leave space for people to come in beside you and support your fire.
Specific tips
This is important; it makes you a smaller target. A successful tactic I've seen used is, whenever you enter a firefight, crouch down. It increases your accuracy, while reducing your own target size. Opponents who aim for the head will have a difficult time as your head continually slides out of their reticule.
Always consider closing the doors you open. Leaving doors open gives enemy players a clue of where you are and where you have gone. Closing doors gives a player the impression they are the first one to breach that area. Or, if you want to confuse them, open every single door you see. That way, they will have no chance of tracking you.
At the same time, you may wish to purposely leave doors open to lure players into an area.
A good trick is to click on the "manipulate environment" button as you begin to pass through a door; you will close the door after you have passed through the doorway, because it takes about a second for the "close door" action to be completed.
A few bursts from a rifle with average penetration will open a locked door much more quickly than a lockpick. A shotgun is the best weapon for this; the MP5 series of weapons will require an entire 30 rounds to open a door. This tactic is generally better than fragging open a door, as you still have the door to close afterwards, and you don't run the risk of accidentally fragging yourself or friendlies.
The Desert Eagle has become the weapon of choice for opening doors; it often only takes one shot.
Useful on a handful of maps; obviously the small ones with a lot of doors. An excellent tactic (although it can easily be accused of being a 'camping' tactic) is to set up a door charge and pair up with someone with a heartbeat sensor. If you're going to take door charges, switch your speciality to demolitions so you set them up more quickly. Don't even think of trying to set up a door charge without doing that, it will take about 30% longer time.
When waiting for a target to approach your door, do not stand behind the door. Move away from it. You run the risk of the enemy shooting open the door, and continuing to fire at you; then what good will your door charge be?
Remember that is as good as impossible to kill someone directly with a door charge. Do to this, the timing must absolutely perfect. A more common result is that the door charge just stun them for a couple of seconds.
Not very useful. If you have to fire 210 rounds (7x30) within a mission, you should think about practising in the range and/or training levels to improve your accuracy. Your default is 150 rounds (5x30) for most combat rifles, which should more than enough. However, in pistols-only maps, it may be worth your while to take secondary ammo, as you only have 3 clips in total for your pistol.
Frags are dangerous to you on any but the best of connections, and will not work like you think they will. On games with lag, you will find to your horror that the frag will not leave your hand after you release the mouse button. Worse, you will find that if you move in the 'holding' period, the grenade will drop whenever the host computer catches up with you. If you're going to use a grenade like this, you must keep yourself aimed properly until the grenade goes. Otherwise, you risk bouncing it off a nearby wall, towards yourself or a friendly.
Best only to use frags on good connections.
That said, the heartbeat sensor and grenades are good companions, and are the absolute best way to take out campers. Once you've identified a target, it's just a matter of find a way to bounce a grenade into their location, without exposing yourself to fire.
Cover is effective with regards to grenades. That is, if the target is crouching behind a couch or bar, it will absorb the grenade's damage.
Flashbangs are very effective; they will stun/blind you for about three seconds, which is an awfully long time in multiplayer.
Frags are also a good way to open locked doors. Just make sure to announce to friendlies that this is what you're intending to do. This tactic may also catch enemy players advancing on the other side of the door.
Launching your frags: When you decide it is time to
frag someone's butt, select them from your menu and start
charging them up. Remember that the more the bar has grown,
the farther away the grenade will get away from you. Basic
rule of thumb is 1/4 strength is enough, but move anyway.
Once you are ready, take CAREFUL AIM and toss that baby.
The key to frags is of course the toss. You want to be able
to get your opponent without getting your ass kicked. In
order to get a better angle on your hostile, you may want to try
to bank it off a wall. But that of course can go bad
quickly as well. Once its gone, move to a slightly retreated
position. Then move in as soon as the frag has blown, so
you can get your opponent cringing, if he isn't already dead.
When to use your frags is as crucial as how to throw them. Use your frags when you have an opponent cornered, or when you need to blow a door that may be hiding somebody. Use them when you want to kill your opponent with a vicious BOOM or just to screw with their mind.
Take it. Use it. Love it. A very good tactic is to pair up with a team-mate and have someone provide HBS support. Working together, you can identify targets and set up an assault or ambush. Alone, you will have to gauge very carefully when to use the HBS and when to rely on visual and auditory cues. The last, worst thing you want to do is be caught with your pants down as you are changing from the HBS to a weapon. However, expect it to happen at least once in your multiplayer gaming...
Zoom out your map while the game is waiting to begin. If you're using a modified map or are unfamiliar with the level, zoom it all the way out to see where you are in relation to the enemy's start location. When the game begins, zoom in to a comfortable level where you can see your immediate surroundings and your buddies. It might also bee a good idea to print out a blueprint of the level on a paper. That may come in handy after an escape from someone. Just make sure you don't get stucked looking at the blueprint or you might just find yourself getting killed.
Know when to move, and when to stay still. Some players choose to move all the time, without stopping; while this can be effective at avoiding fire, it expands your reticule and makes your fire less accurate. Other players find one place and stay there the entire game (camping, or sniping as you may prefer). Fine offensively, but as soon as you open up, you are vulnerable. Find the happy medium.
It's important to recognise that when you stop moving, your reticule becomes wildly inaccurate for a split second and then sizes down to its smallest point according to the weapon's characteristics. So, if you're running and you see an enemy in front of you, it may be worth your while to keep moving as you're shooting, as opposed to stopping and waiting for the more accurate shot. If you've got the drop on the opponent, go for it. Otherwise, fire and pray.
If you're being shot at, run! While you're at it, fire back if possible; they may be your best, luckiest shots (or your last ones if you're too slow..). If you stand still, you're a sitting duck.
How often you should reload depends on your style of play and your weapon of choice, but the last thing you want to do is run out of ammunition at the critical moment. There are basically two different schools of thought on this issue. Some players reload after each kill or engagement, some people reload when they reach a certain number of rounds left in the clip. Generally though, you'll want to ensure you're in a safe situation before reloading, as it takes about 2.5 seconds to reload a rifle and 1.5 seconds to reload a pistol.
If you're in a fire fight and your clip runs dry, consider switching to your secondary weapon instead of reloading your primary; it only takes 1 second to switch to a pistol, and you can have immediate firepower. Most secondaries are not automatic, but there are some Uzi's you can take. The Desert Eagle and the Colt Anaconda are of course always a good choice because of the firepower.
Full-auto: With careful clicking of the mouse button, you can generate 2-round or 3-round bursts, or even single shot fire, and also have access to full-auto fire without the need for switching shot selection. However, each weapon will have different "burst" characteristics, so for some it can actually be worse to go on full-auto fire. Specifically, the CAR-15 and M-16. After about six shots, your rounds will be randomly way off target. This may not be a bad thing if you want to cover a large cone in front of you (i.e., multiple targets), but over a long distance, you will be shooting all over the wall of a very large barn.
Three-round burst: Curiously enough, with this fire setting you can actually empty your clip faster than with full-auto. The three rounds are fired almost simultaneously (I imagine this is less drain on the CPU). In comparing, I found that I could empty a 30-round clip on three-round burst in 1.7 seconds, while with full-auto fire it took me 2.2 seconds. Three-round bursts are way more accurate, and usually take care of the problem of delivering wounds with one round, as the gun sends two more the target's way.
Single shot fire: There are some merits for single shot fire. Generally, it forces you to be more accurate rather than resort to spray-fire tactics. As well, in situations where you will be firing many rounds at long-distance targets (Road Ambush, Airport), it conserves ammo. As well, your shots will stay within the 'circle' portion of your reticule when you're standing still.
Safety: There is no tactical value to this setting; make sure you don't accidentally select it.
Choose your weapons based on the level at hand. On open maps like Road Ambush and Airport, you will do best with long range weapons like the M-16 or CAR-15, which have a high zoom factor; on interior maps like Ship and Embassy, you will do better with the quick-aiming weapons of the MP5 series. However, the submachineguns don't have as much penetration, so you have to aim for either the head or legs, and hold down the trigger.
If you're not sure which weapon to take, the CAR-15 is generally the best all-around weapon.
As mentioned in general tips - know your map, it is essential to know how the maps look like. One way of doing this is playing the game for 24 hours/day for about a month or so like a madman until you know every single corner of the game. A second way of doing this is to play the most important maps until you know them partially. This is what most people do. But what happens if you play one of those maps you haven't played as much as the others? Well, I would guess you will be pretty lost.
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