For picking up roadkills, Conquest mode is probably the best. There tend to be more vehicles available than in other modes, and in more predictable locations.
You might also find that it's actually easier to pick up roadkills in armor than with a quad bike. Quads have a relatively low area to impact the target with, and you can get roadkills by trapping opponents against a wall or other obstacle with an armored vehicle.
That being said, the most important trick to getting roadkills is to drive a lot of vehicles. However, try not to make it too obvious that you're going for the roadkill. When you do that, you tend to move in a straight line towards opposing infantry, which makes you an excellent target, and it rarely works, since the guy on the ground can change direction a lot quicker than you can in the vehicle. You're better off just doing a lot of driving and picking up the kills in the course of the game.
Both games implement some combination of or have variations for each of the following features:
- Scope sway
- Gravity induced bullet drop
- Bullet travel time
- Body posture
- Clothing (Ghillies)
- Tools
Battlefield:BC2
Scope sway
None. BC2 does not implement a "breathing" aspect for sniping. Thus your crosshairs are stationary unless you move them.
Gravity induced bullet drop
Yes. As range to target increases the actual point-of-impact of your round with relation to the center-point of your crosshair increases.
With very long range laterally moving targets you have to put their torso in the lower-left/right quadrant of the scope and fire to get a hit.
I feel that it makes stationary target sniping ridiculously easy compared to MW2, but makes it harder to hit moving targets.
Bullet travel time
Yes. You must lead targets that are in motion.
Body posture
You cannot go fully prone in BC2. You can only kneel.
Clothing
Snipers wear ghillie suits. Their utility can be limited since they cannot go fully prone. It is still useful in large bushes and trees though.
Tools
There are no thermal scopes, heartbeat sensors, AC-130's or other anti-sniper elements in this game.
Call of Duty:MW2
Scope Sway
Yes. MW2 implements a "breathing" aspect for sniping. Thus, when completely stationary your crosshair will bob semi-randomly.
You can also "hold your breath" for a short amount of time which reduces the movement, though not completely.
Gravity induced bullet drop
None. Whatever is under the center-point of your crosshair when you pull the trigger is what gets hit.
Bullet travel time
Yes. You must lead targets that are in motion.
Body posture
You can go fully prone in MW2. This decreases scope sway and makes you harder to see.
Clothing
Snipers can wear ghillie suits. The suit must be unlocked. Different camouflage colorings can also be unlocked.
Tools
As a sniper you can unlock a thermal scope which makes sniping super easy-mode.
However, you are also terribly vulnerable to things like AC-130's, Harriers, etc. unless you are using cold-blooded.
Best Answer
Individual or Grouped
The damage you do is simply a function of the number of C4 you set off, whether you set them off individually or in groups.
Count
In his excellent analysis of BFBC2 damage, Den Kirkson analyzed the code and found that C4 does 290 damage at 0-1 meters, and then does a linear drop-off to zero damage at 8 meters. (A human without body armor in the game has 100 hit points, a tank has 1250.)
Kirkson doesn't document, and I don't know, exactly how much health an MCOM station has. But it takes 12 C4 to take out an MCOM station, so the health is somewhere in the neighborhood of 3400.
Which is a lot.
MCOM Collapse
Because of the MCOM's massive health, it's always better to take out a station indirectly by taking out the building when possible. This guide gives details on how many C4 it takes and where to place them on some of the Rush buildings. It takes much less C4 than taking out the MCOM directly.
Placement
It's fine to place your C4 within 1 meter of the MCOM, but be sure no indestructible obstructions will interfere with the blast radius.
Personally, I like putting them on the ceiling since enemies are least likely to look there when running in to disarm the MCOM.
Sequence
I used to arm the MCOM before setting the C4. That was... um... a really bad idea. Gives people extra time to find you before you hide. Don't do that.
Loadout
People often think of C4 as a recon thing, but if you want to be a C4 thug you should really play assault and use one of the "all classes" weapons, which will let you pick C4 as your add-on. Your ammo crate gives you an unlimited supply of C4.
Regardless of which kit you play, if you take the explosives perk you'll be able to carry 6 C4 at once, enough to take out many buildings without re-arming.
Out of Bounds
One favorite tactic of... certain people... is to have a friend load up a UAV with C4 and pilot it right to the enemy's MCOM. Do this a couple of times and you can take out the station with no risk.
Except for the risk of getting cursed out, kicked, or even banned, because it's an incredibly lame tactic.
So don't do that.
Use Mines Instead
The engineer's mines have the advantage of staying around and active after his death. A recent poll in the BFBC2 forums shows support for this method.