Aliens & Enemies

ANT LION: A new type of alien that works in groups. You can control them by using the pheromone grenades. More details on that in the weapons section

ANT LION GUARD: This is just a bigger version of the ant lion. It packs a good punch and can send you flying through the air if it bats you with one of its legs.
COMBINE SOLDIERS: These soldiers seem to have many faces. They are found mostly in City 17, and need to be disposed of.
HOVERING SHIP: Not much is known about these except their pretty hard to take out. In the E3 video the only effective weapon was an RPG. These ships move very fast and blasts out bullets from the front.
HEADCRAB: There's no mystery to these, as they haven't changed at all since the original Halflife. When they get close enough to you they pounce causing minimal damage. More a pain in the ass alone, but critical in higher numbers.
HYDRA: (The blue line) Can be found in aquatic areas. Doesn't seem to have many friends, as in this picture its actually attacking a combine soldier. It deals a great amount of damage as it spikes out at its victims.
MANHACKS: Don't let size mislead you. Though small they come at you fast with rotating blades that are extremely hazardous to your health. They move so quickly that you may find your spending too much ammo on them and resort to the crowbar.
SCANNERS: These things fly around City 17 looking for invaders that don't belong. Its believed they are deployed by the combine soldiers. Once they spot you they will alert the enemy of your location.
STRIDERS: Probably the tallest enemy in the game. These look like giant daddy longlegs (just with 3 legs). They shoot out bullets from their head, and their sharp legs can slice right into you for a quick death. They are featured in City 17.
ZOMBIES: Similar to the zombies in the original Halflife. They have been reskinned and look much more realistic then before. Zombies come to life after a headcrab takes over a dead body. To rid yourself of these you must somehow blow off their head which contains the headcrab. Otherwise they can possibly come back to life later.