When the Combine raid your Resistance hideout, you are forced to flee into the depths of the Outlands. But with Overwatch forces hunting you down, and the local fauna out to get you, danger is always just around the corner. Play through four chapters of Half-Life gameplay, exploring new locations, meeting new characters and uncovering lost secrets.

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Uncertainty Principle out now on RunThinkShootLive

Uncertainty Principle out now on RunThinkShootLive

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Uncertainty Principle is now available to download!

Release Uncertainty

Release Uncertainty

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The mod Uncertainty Principle is not cancelled or abandoned, it is safe on my hard-drive and mostly complete. Unfortunately I'm just not going to have...

Long overdue update

Long overdue update

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An update on the development of Uncertainty Principle.

All about Uncertainty Principle

All about Uncertainty Principle

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Here's some more information about this mod for you.