Here are some general tips from an advanced player for all of you who are looking for an edge in this game. You may know some or all the things in this article depending on your skill level. Even if you are an expert player this article should help you remember the fundamental that make you a good player. This article focuses on individual fighting tips, perhaps a future article will address team strategy.
From close range you can hit for a lot more damage when holding two weapons. From a distance, the battle rifle is the weapon of choice if you cannot get your hands on a sniper rifle. My favorite combo for quick kills is the plasma rifle/smg combo and the pistol/smg combo. If you aim at the opponents head and they don't aim at your head, like most people, they will be wondering how they died so fast. The plasma rifle combo is better against multiple opponents and the pistol is more effective against single opponents. This is because the pistol runs out of ammo quickly. If you can find a plasma pistol, the plasma pistol/smg combo is not bad, but it leaves you vulnerable if you miss the charged shot or if there are multiple opponents.
Plasma Pistol/Battle Rifle:
This in my opinion is the ultimate combo. If you are at close to medium range, hit them with the plasma pistol and shoot them in the head with the battle rifle. At long range, pick them off with the battle rifle. This is a frustrating combo to fight against when the opponent is good. This is one of the reasons you see a lot of Human Slayer games now.
This is one of the things that separate good players from weaker ones. It takes a lot of practice to become an expert with grenades, but it is one of the easiest ways to kill someone. Use common sense, throw the grenade where the player will be not where they are right now. If you see someone running towards you, backup behind a wall and throw a grenade in their path. If you are surrounded, try to get off two grenades and you will sometimes get several kills. If you hit someone with a frag grenade, and you hit them in the head with a battle rifle, they die in one shot.
If you are shooting someone and you can walk up to them, melee them if you can. Sometimes it is better to back up rather than melee. For example if you are dual wielding and did not get the first shot off against a single wielder, back off so you kill him rather than get meleed. Don't forget that you lunge slightly when you melee, so use that to your advantage.
Where to walk:
Try to flank people as much as possible. For example if you are on top of big base sniping and you see someone on the radar coming up, look through or jump through the hole behind you and take them out. On ivory tower, if you are at the top and see someone coming from dark side, jump down a level and flank them. Do not run into rooms with more than one enemy, let them come to you or weaken them with grenades first, it is much easier to kill them that way.
Summary: The #1 tip I can give you is to aim for the head no matter what weapon you are using, except the shotgun. You will kill them a lot faster. Other than that, learn the maps and the weapon combos that work best in different situations.
Tony James is a supporter of freeware games and runs (Freewaregames.net-free fullversion games) a well known freeware games resource