Alien Weapons
Claws
The claws are the aliens rapid fire weapon. Though not as powerful as the tail whip and jaw bite you will continulously go back to them because they are not as slow as the tail whip and not as hard to use as the jaw bite. Clawing at dead bodies will give an extra health bonus and it the head is directly in the center of the screen, pressing the claw button will preform a head bite.
Claws against Marines
The claws can shred a marine in seconds. You will be most likely to use your claws against a marine because both the tail whip and the head bite take to long to execcute. For best effect try to get the marine from behind quickly. You may also want to perform a jumping attack by jumping at the marine and clawing at the last minute. In multiplayer, use the claw attack against lightly armed marines because they will be less likely to take you out. If you use claws against a marine armed with a minigun do not do a continued attack or you will be shredded. Instead , do 2 or 3 attacks and run away(everyone is stronger in multiplayer and it would take too long to kill a marine with a sustained attack)
Claws against Predators
The claws are not the best bet against predators. Predators are the strongest and clawing would only do a little damage. If you try to kill a predator with claws make sure it is in sight at all times and circle strafe around it . Claws do minimal damage to the predator and in multiplayer it would be quite foolish to keep a sustained attack against a predator. The predator has several auto tracking weapons and if you stick around you will muost likely get a disk in your head. Instead use tail whip and claws together. Claw , tail , tail , claw.
Claws against Aliens
Aliens are the weakest species and an alen battle with claws would do good. You have the same weapons as your opponenet and will take them out fast with claws. Never forget how fast the alien is or youll be sorry. If the other alien is better at using its speed you may be killed. That other alien may be able to escape before you can kill it. You will never face other ailens in the single player game , so this is only for multiplayer. If you get injured remember to run for safety. The alien is both a good fighter and the fastest runner.
Tail Whip
The tail whip is more powerful than the claw attack. It is much better for surprise attacks because of its auto aiming. Hold the tail whip button down for a more powerful attack. Your aim does not need to be entirely perfect because it will automatically hit the target in your view range. The tail whip is probably the best alien weapon. Be warned that it is not as quick as the claw attack and may miss if you are careless. Also be careful around explosives because the tail will automatically aim for them and may injure you.
Tail against Marines
The tail will normally kill a marine with one hit in singleplayer. If you dont want to miss as easily use the tail. It is especially usefull for surprise attacks because of the autoaiming abilities. The tail is best against heavily armed marines because it will more often than not score an instant kill. The tail will also hit from a longer distance than the claws and is usefull if you are on the ceiling. Because marines with mini-guns will often back into corners in multiplayer, dropdown on them and begin using your tail whip. They wil have to readjust their aim and this will give you precious time to attack with both claws and tail. If they start firing, dont stick around long enough for them to hit you.
Tail against Predator
Tail against Alien
The alien is as weak as you and will be taken out with one or two good hits. Aliens are so fast that you can not always depend on your tail's autoaim to save you. Beacause of this, it is a good idea to keep the alien in the center of the screen at all times when you are fighting him/her. Alien battles end very quickly and you wil not have a long sustained battle. Of course , in species deathmatch you wont have to worry about this.
Head Bite
The head bite is both the hardest attack to pull off and the most rewarding. To perform a head bite, line up the head of a victim in the center of the screen. When it is lined up correctly, you will see the inner jaws on your screen. Then tap the primary fire button(claws) and you will perform a head bite. The head bite will also give you an added health bonus. Using the head bite will kill the victim instantly. You can also head bite dead victims for a smaller health bonus.
Head Bite against Marines
The head bite is awesome against marines. It will score an instant kill nomatter what the marine's health or armor is. This is not true in multiplayer because the marines are stronger. In multiplayer it may take 2 or 3 head bites to kill a marine. In multiplayer, the other players hardly ever crouch so you dont need to adjust your head up or down. It is to your advantage that the people are stronger because then you get more health.
Head Bite against Predator
At first the head bite will not work against the predator because of its superior armor. If you wear it down, it will be susceptable to the head bite. Because of its armor head bite is not the best move to use against predator. You would be better off using tail whip.
Head Bite against Aliens
You can not perform the head bite on aliens.
Special Alien Abilities
Wall Climbing
If you press the crouch button and walk into a wall you will climb it. The alien can climb on almost any surface. When the crouch button is released you fall back to the ground. Many of the games single player levels require you to climb on the walls to succeed. When attacking enimies, it is always a good idea to attack from the ceiling. In multiplayer, in dark rooms, the marines will barely be able to see you and if your'e on the ceiling you'll preform a surprise attack. Wall climbing is one of the many unique things that the alien can do. Use it to your advantage.
Speed
The alien is by far the fastest species. In any race the alien would win every time. This, along with its wall climbing abilitites makes it deadly. When playing as the alien never forget your speed. If injured run forward, not backwards. This way you will not give the enemy more space. Remember, Marines are much more deadly in open spaces. Always try to close the gap between you and them.
Acid Blood
The alien has deadly acid blood just like in the movies. Of course the alien cant really use this to its advantage but it is important to remember if you are fighting an alien. Always aim for the head because there will be less acid sprayback. Also, allow bodies to disappear so that you are not killed by their blood.
Falling Damage
The alien can not get hurt from falling. You can fall from any height and still not get injured. You can go as fast as you want near large gaps and not worry about dying. If you see an enemy on the ground below you in multiplayer, do not hesitate to jump down to their level. You will gain both surprise and ground , and both of these the alien strives to acheive. Use caution in someplaces however. In the bonus mission Caverns, there is a bridge with spikes below. A fall would be deadly.
Vision Modes
Hunting Mode
Hunting mode is the alien's default mode. It is slightly round and distorted. Some people think it is annoying but I hardly notice. Each species is has a differnt aura. Humans are blue, predators are green, and aliens are red. Androids don't have auras and do not glow at all. The prey is easily seen in total darkness because of its aura. In hunting mode, the alien can also see cloaked predators. Their bodies disapear but the alien can still see the green aura. The alien's hunting mode is basically the same as the enimies except that each species has an aura.
Navigation Mode
Navigation mode is the view mode that you'll use least. It looks like a photographic negative. Enimies dont stand out in navigation mode like they do in hunt mode. Navigation mode is best for dark areas. When fighting predators it is best not to use navigation mode because they will be cloaked and you will not be able to see them.