Now Counter-Strike 2 is on its way, naturally, our imaginations turn to what else Valve might have in the works - and it might, just might, be Portal 3. It's been 12 years since the last full instalment of the puzzle-driven FPS game, but based on hints from a couple of Valve employees, the studio is working on a new, secret project, that sounds very, very Portal. Or it could be Left 4 Dead 3, or maybe, at last, the practically mythical Half-Life 3. Or perhaps Neon Prime. It's a mystery, but the house that Steam built is certainly up to something.
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