NB: Half-Life's page on Steam is reportedly crashing for some users, and the game is no longer showing as free to download.

Half-Life is arguably one of the greatest PC games of all time, if not the greatest. Valve's 1998 game reaches brand-new audiences more than two decades on, proving how it continues to stand the test of time. The sci-fi shooter combines its action with puzzles and an intriguing story, making for the ultimate addictive gaming experience. If you haven't yet seen why the Half-Life hype never seems to die out, you can grab Valve's ground-breaking game for free on Steam right now.

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