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Valve developers discuss why Half Life 2: Episode 3 was abandoned

Anniversary doc also includes footage of unused ice gun, blob enemies.

Players would have been able to use that gun to freeze enemies, set up ice walls as makeshift cover, or construct icy ledges to make their way down sheer cliff faces. The developers also describe a so-called "Silver Surfer mode" that would have let players extrude a line of ice in their path then slide along it at slippery speeds. Despite the new weapons and mechanics that were already in the works for Episode 3, many developers quoted in the documentary cite a kind of fatigue that had set in after so much time and effort focused on a single franchise.

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