| Achievement | How to unlock
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| - Defuse a roomful of explosive barrels.
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| - Use the gravity gloves to loot an item off a living Combine soldier.
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| - Shut down the substation.
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| - Kill the annoying headcrab before it breaks everything.
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| - Use the gravity gloves to intercept an incoming enemy grenade in mid-flight.
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| - Measure Russell with the Geiger counter.
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| - Test your grip on a headcrab heart.
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| - If you are reading this achievement, Gabe Newell has successfully launched Gnome Chompski into space. If you did not also receive the achievement 'Manufacturing Ascent', Newell has abandoned his plans to shoot Noam Chomsky into space.
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| - Bring a garden gnome with you to the Vault.
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| - Get creative turning the power back on.
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| - Start climbing the water tower.
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| - Break out of the Combine prisoner transport vehicle.
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| - Catch a bottle falling out of a cupboard before it breaks and alerts Jeff.
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| - Kill a Combine Heavy while their shield is up.
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| - Represent yourself with a specific prop on Russell's map.
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| - Catch Russell's ammo magazine before it hits the ground.
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| - Pick up and smash fifty glass bottles.
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| - Stay close to Jeff for ten seconds (but not too close).
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| - Stop the prisoner transport train.
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| - Interact with the playground somehow.
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| - Kill a grunt by shooting their gas tank.
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| - Enter the Quarantine Zone.
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| - Use the multitool to hack a tripmine.
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| - Reach the aquatic exhibits.
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| - Break open a supply crate with your hands.
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| - Escape the distillery without killing Jeff.
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| - Escape the underground pit.
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| - Bring Russell a bottle of vodka.
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| - Solve the tanker yard's electrical puzzle and escape.
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| - Install your first pistol upgrade.
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| - Enter the explosive Xen infestation.
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| - Snatch a Xen grenade from its resting place.
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