Okay, here's a quick guide to Battlefield 4 (if you're a noob, you want to score more points, etc.)
Game Modes Explanation
Rush: Attackers have 75 tickets and have to arm and successfully defend the charge until it detonates. Usually 3-5 stages depending on the map. Every kill by the defending team with drain a ticket. Keep in mind the charge has about 40 seconds or so to be defused/detonated.
Obliteration: Each team had 3 sites that they have to defend while a neutral bomb spawns in the middle of the map. The team with the most sites left will win. Keep in mind that the charge has about 10 seconds or so until it detonates, meaning you have to be right next to the objective in order to defuse it in time.
Conquest: 5-7 flags are located around the map while each team spawns will 800 tickets. The team with the majority of flags held with slowly drain the enemy's tickets (the speed of depletion depends on how big the majority of flag's held are). Each kill by your team will also drain the enemy's ticket by 1.
Tips
1.) PTFO
Always make sure that no matter what game mode you're playing (Conquest, Rush, Obliteration), that you're always paying attention to the objective. If you're playing Obliteration and you notice the enemy bomb carrier is near your spawn, then spawn near your base. Don't spawn on one of your squadmates who's busy trying to spawn trap the enemy.
- In Rush and Obliteration, a flashing objective marker means that it's been armed by a team mate or enemy (depending on whose side you are)
- In Conquest, you need more friendly players than enemy players within the flag radius to capture it. If you're trying to capture the flag and notice it's not moving (or the orange bar is filling up again) then know they're are a lot of enemy players in your vicinity
- Don't always run straight toward the objective. Always try to flank with your team mates while using cover
2.) Learn to spot
Always make sure you press that RB/R1 button whenever you think you see something move in the distance. Try to make it a force of habit, because whenever you spot an enemy that you aren't able to kill, a team mate will usually take him out.
3.) Play your class
If you're playing Assault, make sure you either get a Defib or medkit (or both). If you're an Engineer, get a repair tool and rocket launcher or mines. If you're a Support, get an ammo pack along with something useful, like C4 or MAP-S. If you're recon, basically anything is fine as long as you use it.
- The longer you charge the Defib (hold RT/R2), the more health the revived player has
- Bullet drop also affects rockets. Make sure to aim higher and whatever direction they're going depending on how far they are
- Repair tools do a lot of damage to enemy vehicles
- It only takes 2 C4 to the back to destroy all land vehicles
4.) Don't reload after every kill
I know it's a force of habit to reload after every kill, but a enemy soldier will usually have a team mate spawn on him or have some one nearby, especially in 64 player conquest.
5.) Don't abandon vehicles
Please don't leave a tank or IFV while it's full health because you decided that you only wanted it to get across the map. The enemy will usually steal it, and they get that vehicle in addition to their vehicles.
6.) Fire in short bursts
Obvious, but always shoot in small bursts whenever you engage an enemy unless you're right next to him. This helps conserve ammo and makes you more accurate. Shorten your bursts depending on how far away the enemy is (large bursts when near, single shot when far).
7.) Always squad up whenever possible
If you join a game and notice that you have no one in your squad (or maybe 1-2 people) then leave and join another. Try to join one that needs your specific class or is nearly full.
8.) Try to play a class that the team needs, not the one that you want to play
If you notice that the majority of your team are playing Assault and Recon, please don't go to one of those classes. Try to play to either what the squad needs or what the team needs.
- Try to balance yourself by playing all the classes. This allows you to have a similar number of unlocks between classes and won't leave you underpowered if you decide your team needs a Support.