Proto:Half-Life 2 (Windows)/September 26th 2003 Build/Alien Enemies

This is a sub-page of Proto:Half-Life 2 (Windows)/September 26th 2003 Build.

Antlion Soldier

The Antlion behaves exactly like it does in the final game, but has a brown exoskeleton and a darker, less-detailed inner body.

Prototype	Final

Prototype	Final

Prototype	Final

Antlion Guard

The Antlion Guard is in the game and fully functioning. However, it is bulletproof to everything except for the Combine Gunship's stomach laser and explosions. If killed, it drops a Bugbait every time regardless of what map you're on.

Like the Soldiers, the Antlion Guards look more brown and dull in the prototype. It does have a much better bump map than the one in the final game though.

(Source: Pelpix)

Prototype	Final

Prototype	Final

Prototype	Final

The prototype also contains a low-poly Antlion Guard model meant for a scrapped DirectX 6 mode. Oddly, this model looks much closer to the final design than used prototype model.

DirectX 6 Antlion Guard	Final

DirectX 6 Antlion Guard	Final

DirectX 6 Antlion Guard	Final

Barnacle

The Barnacle is near-identical to the ones in the final version, with a couple minor differences. Its hitbox is located only around the mouth area, making it much harder to kill than its retail counterpart.

Also, when killed, the Barnacle will vomit out human gibs from the original Half-Life (which must be converted to the v37 model format in order to work properly) instead of human bones.

Ichthyosaur

The Ichthyosaur has extremely barebones AI. It will only attack if the player is near its face. Otherwise, it will do nothing. It can be killed, but it will not turn into a ragdoll.

Of note is that the Ichthyosaur's actual hitbox is only in the creature's body. Otherwise, it can be swam through with no problems.

Classic Headcrab

The Classic Headcrab's model is close to the final's design, but the texture is very different. The coloring appears to be closer to the Headcrab in Half-Life, with a light body and brown limbs. It's also quite bloody unlike the final one.

The only gameplay difference is that it does 5 damage on Easy and 10 in other difficulties. It does 10 damage in all difficulties in the final version.

Prototype	Final

Prototype	Final

Prototype	Final

Fast Headcrab

The Fast Headcrab keeps the same shape, but the texture has more of a green-yellow tint to it, and also has black spots not present on the final design.

It has 10 health on all difficulties except for hard mode, where it has 20 health.

Something of note is that various resources imply this was to be the "main" headcrab's design at one point. The Headcrab used in the Brickbat weapon is an early version of the Fast Headcrab's design, but the model for this weapon does not mention the Fast Headcrab. There is also a model featuring a run-over Headcrab that uses the Fast Headcrab's design instead of the Classic Headcrab design. Finally, the Fast Headcrab's model is named "headcrab.mdl", while the Classic Headcrab is called "headcrabclassic.mdl".

Prototype	Final

Prototype	Final

Prototype	Final

Poison Headcrab

The Poison Headcrab, like the others, uses rougly the same model but has much different textures. Its body is more brown, the spots are in different locations, the legs are slightly thicker, and it has no hair anywhere on its body.

It also behaves a bit differently, retreating when its health is low (though it will retaliate regardless if the player gets too close). It has 35 health on Easy, 45 on Medium, and 55 on Hard.

Prototype	Final

Prototype	Final

Prototype	Final

Classic Zombie

The Classic Zombie keeps the final's basic design, but has several texture differences. First, the prototype Classic Zombie is wearing darker-colored clothing, and in particular wears khaki pants rather than jeans. The proto design also has a lot less blood on it than the final design does, but has more clothing tears and gashes. The biggest design difference is when the Classic Headcrab is removed from the body, it reveals that the head is entirely gone minus the lower jaw, similar to the Zombine in Half-Life 2: Episode One.

The Classic Zombie seems to use shortened versions of the screams and cries in the prototype.

A placeholder texture found in the Classic Zombie's texture folder.
Pre-release screenshot showing the prototype Classic Zombie.

Prototype	Final

Prototype	Final

Prototype	Final

Prototype	Final

The split halves of the Classic Zombie use a completely different design to the non-split one. The split Classic Zombie has a plain white shirt with blue sleeves and blood on it, khaki pants with different tears/wounds on it, less detailed shoes, and, oddly enough, it's not only missing the mouth-like wound on its chest, but it even has a very low-poly and blurry head intact. A complete version of this design appears in an early pre-release image and the pre-E3 2003 trailer.

Legs front.
Legs back.
Full version of the Classic Zombie seen in the Classic Zombie Torso and Legs models.

Prototype Classic Zombie torso model	Prototype Classic Zombie

Protoype Classic Zombie torso model	Prototype Classic Zombie

Prototype Classic Zombie torso model	Prototype Classic Zombie

Prototype Classic Zombie torso model	Prototype Classic Zombie

Remnants of another design based on an older Citizen design (whose textures can be found in the prototype) can also be found. It seems to be limited to the body and Headcrab (which seems to match the Fast Headcrab).

Shirt.
Headcrab.

There's one more very early design present. This design has the Classic Zombie wearing a tan outfit with a brown armband that somewhat matches the Samuel model in the prototype's files and has a unique head texture that has both the Headcrab and face on one texture, suggesting that the Classic Zombie's Headcrab either used a unique model for the Headcrab or the Headcrab was modeled directly on the Classic Zombie, like the Zombie in Half-Life.

Hand.
Back.
Back mask texture.
Chest.
Headcrab with face texture.
Environment mask texture for Headcrab.
Slightly different version of the face in the Headcrab texture.
Left arm.
Left leg.
Misc (part of the chest maw).
Right arm.
Right leg.
Shoe top.
Shoe sole.
Torso.

Fast Zombie

The Fast Zombie's design is completely different from the one in the final game. The prototype Fast Zombie's body is still intact as opposed to being a fleshy skeleton. It has no shirt and wears brown pants with white socks on its feet. When the Fast Headcrab is removed, the Fast Zombie's head is extremely pink and malformed.

The Fast Zombie doesn't appear to be sequenced correctely. Some of the errors the prototype Fast Zombie has includes not playing the jump animation when leaping, instead using its idle animation, and not playing a roar animation while roaring after a melee combo, despite having these animations.

Unused barefoot and leg texture found in the Fast Zombie's texture folder.

Prototype	Final

Prototype	Final

Prototype	Final

Prototype	Final

Prototype	Final

Poison Zombie

The Poison Zombie's design is mostly the same, but the skin is more purple and it's less detailed in general. It's also wearing brown pants as opposed to jeans.

It behaves the same as it does in the final game. Its has 175 HP on Easy and Normal difficulties (the same as it is in the final game), but 210 in Hard.

(For the sake of visual clarity, the Poison Headcrabs on its back have been removed for the images below.)