Garry's Mod

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HAPPY 25TH BIRTHDAY HALF-LIFE! 🎂🎉 To celebrate, we've launched the LambdaGeneration Half-Life 25th Anniversary Adventure! Explore Valve's legacy, from Half-Life 1 to Alyx. Featuring *the* voice of Dr. Isaac Kleiner - Harry S. Robins! Play: hl25.lambdageneration.com/ (psst. There's a new achievement on the site too for those who complete the game 😎)

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