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 Soldiers behave exactly like they do in the final game, but have brown exoskeletons as well as darker, less-detailed inner bodies.

Prototype	Final

Prototype	Final

Prototype	Final

Antlion Guard

The Antlion Guards are in the game and is fully functioning. However, they are bulletproof to everything except for the Combine Gunship's stomach laser and explosions. If killed, they drop Bugbaits every time regardless of what map you're on.

Like the Soldiers, the Antlion Guards look more brown and dull in the prototype. They don't 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 the used prototype model.

DirectX 6 Antlion Guard	Final

DirectX 6 Antlion Guard	Final

DirectX 6 Antlion Guard	Final

Barnacle

The Barnacles are near-identical to the ones in the final version, with a couple minor differences. Their hitbox is located only around the mouth area, making them much harder to kill than their retail counterparts.

Also, when killed, the Barnacles 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 Ichthyosaurs have extremely barebones AI. They will only attack if the player is near their face. Otherwise, they will do nothing. They can be killed, but they will not turn into a ragdoll.

Of note is that the Ichthyosaur's actual hitbox is only in the creature's body. Otherwise, they 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 Headcrabs in Half-Life, with a light body and brown limbs. They are also quite bloody unlike the final one.

In terms of gameplay differences, they do 5 damage on Easy and 10 in other difficulties. They do 10 damage in all difficulties in the final version. Another difference, is that unlike in the final version, the standard Headcrabs tend to play a unique animation, both when seeing the player and when about to jump.

Prototype	Final

Prototype	Final

Prototype	Final

Fast Headcrab

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

They have 10 health on all difficulties except for hard mode, where they have 20 health. Similarly to the prototypical standard Headcrab, they tend to only play an animation before leaping at their enemies.

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 Headcrabs, like the rest of the Headcrab family, uses roughly the same model but has much different textures. Their bodies are more brown, the spots are in different locations, the legs are slightly thicker, and they have no hair anywhere on their bodies.

They also behave a bit differently, retreating when their health is low (though they will retaliate regardless if the player gets too close). They have 35 health on Easy, 45 on Medium, and 55 on Hard.

Prototype	Final

Prototype	Final

Prototype	Final

Classic Zombie

The Classic Zombies keep 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 Headcrabs are removed from the host, they reveal that the head is entirely gone minus the lower jaw, similar to the Zombine in Half-Life 2: Episode One.

The Classic Zombie voice lines tends to cut-off very frequently unless pausing the game, which is fixed up for the retail release.

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 Zombies use a completely different design to the non-split one. The split Classic Zombies have a plain white shirt with blue sleeves and blood on them, khaki pants with different tears/wounds on it, less detailed shoes, and, oddly enough, they're not only missing the mouth-like wound on their chests, but they even have 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

Prototype 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 Zombies 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 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. They have no shirt and wears brown pants with white socks on their feet. When the Fast Headcrabs are removed, the Fast Zombie's head is extremely pink and malformed.

The Fast Zombies don't appear to be sequenced correctly. Some of the errors the prototype Fast Zombies includes not playing the jump animation when leaping, instead using their 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 design is mostly the same, but the skin is more purple and is less detailed in general. They also wear brown pants as opposed to jeans.

They behave the same as they do in the final game. They have 175 HP on Easy and Normal difficulties (the same as they are in the final game), but 210 in Hard.

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