Half-Life² Alpha version 2

As the game engine further developed Valve added Prop Physics and certain other material to create what is known as the Source Engine. The second Half-Life² Alpha version ran of the Source Engine and had a new game menu system, an addition of physics to world props, a new HUD for in game, and also rag doll effects to models. The 2^nd version had more models for characters and maps created by Valve members. This version introduced the development of the Borealis, the Air Exchange, Parts of City 17, and the Kraken Base. In this version Gordon was to start the Half-Life² story at the Borealis with resistance from Stalkers, Zombies, Soldiers and Ichthyosaurs'.

The Borealis with old HUD and Old Combine Soldiers:

The Borealis with a Zombie:

A Strider in old City17 with old Citizens:

An old Part of City 17:

The old Citadel:

The old Alyx Head:

Animal (conscript):

An old Combine APC:

The Assassin aka Prowler:

A Borealis Worker:

A Head-Crab Birther:

Captain Vance (the old Eli Vance that had no relation to Alyx and died in the story):

Child Workers:

Chort (The old Kliner):

Another version of the Citadel:

The Combine Elite had special camouflage that would change in each different environment:

The Combine Guard who's model later changed:

The Cremator:

The old Combine DropShip:

The Factory Worker's Old Clothes:

An old City 17 Terminal:

A Motorsynth

A Crabsynth:

The Old Odell Textures:

Samuel the man Gordon meets on a train ride threw the wasteland to City17:

wearing a gas mask:

A Sandbarnacle:

The Hopwire weapon:

Wasteland Scanners:

The Zombie Assassin:
a Worker: