Valve Reveals Early Gameplay Of Canceled Half-Life 2 Episode 3 And Why It Never Got Finished
Briefly

"Even into Episode 3, I still don't know what that would have been if we'd built it because it hadn't been built," said series writer Marc Laidlaw.
"That was the feeling of excitement. Of something I can't even imagine is going to happen with this team. I was not imposing a top-down, 'This is what we must do to tell our very important tale,' you know?"
Valve was apparently working on an ice gun that would let players create icy structures, pathways, and barricades during combat.
According to Speyrer, Episode 3 was set in the Arctic - something that previously released concept art hints at.
Read at Kotaku
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