Half-Life 2: Episode 3 could have featured an ice gun and blob monsters, as seen in new documentary footage
Half-Life 2 just turned 20-years-old, and to celebrate Valve updated the game with some new features. They also produced a documetary in which several of its development team look back on their work on the game and its episodic expansions - including the never-released Episode 3.
The documentary includes in-progress footage of the episode in action for the first time, and it shows an ice gun and a new liquid enemy type.
The discussion of Episode 3 begins at 1h 52m, with concept art and eventually in-game footage. The in-game footage is all taken from test arenas and tech demos, not finished parts of the game. Various Valve developers say they worked on the episode for around six months, before moving over to the original Left 4 Dead, never to return.
There are two main features of the episode discussed. The ice gun let you create geometry by spraying ice, so you could create impromptu cover to hide behind, which soldiers would shoot through and eventually smash. You could also use it directly as a weapon to freeze enemies, or in what is described as a "Silver Surfer mode", to extrude an ice path in front of yourself as you slid along it.
An ice gun is thematically appropriate given Episode 3 was due to take place (at least in part) in the Arctic, as Freeman headed to the icebreaker ship Borealis referebced in Episode 2 (and initially planned as a setting for Half-Life 2).
More interesting is the new enemy type, called "the blobs", which is a descriptive name. They are blobs, like liquid droplets, which can change shape, separate, and sluice around environments. They could absorb other enemies or physics objects, and squeeze (or fall) through grates.
It's anyones guess whether these elements would have made it through to a release version of Episode 3, or whether the blobs would have been fun to fight. They certainly look cool, though.
"I still don't know what that would have been if we'd built it, because it hadn't been built," writer Marc Laidlaw says. "That
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