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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Half-Life 2: Uncertainty Principle is out now! It's available exclusively to download over at RunThinkShootLive.com (although it will be uploaded here too after a timed period).

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.

2015 09 26 00011

2015 09 26 00024

2015 09 26 00040

Hope you enjoy playing!

Release Uncertainty

Release Uncertainty

News 6 comments

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

News 2 comments

An update on the development of Uncertainty Principle.

All about Uncertainty Principle

All about Uncertainty Principle

News 2 comments

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

RSS Files
Uncertainty Principle 1.0

Uncertainty Principle 1.0

Full Version 2 comments

The full release version of Half-Life 2: Uncertainty Principle in .zip format.

Comments  (0 - 10 of 49)
Re-synthesizer
Re-synthesizer

"Uncertainty Principle" 'was' a very well designed and great mod -- one of the most underrated HL2 user-made mods I have ever played. The level design for the most part was fantastic and the 'swamp boat' action sequences were so well done that they were comparable to that of the 'official' HL2 game.

Unfortunately, the VERY ENDING of this mod mostly ruined it for me......hence I typed that this 'was' a great mod, instead of 'IS' a great mod.

The VERY ENDING of "Uncertainty Principle" throws countless enemies at you simultaneously and is ridiculously, impossibly-difficult -- forcing you to use BOTH an 'invincibility' cheat as well as constantly reloading the 'all weapons' cheat ("impulse 101"). Simultaneously, during this time, an attack helicopter appears which requires no less than about 50 rpgs to bring it down.

There were also a handful or two of 'error scripts' throughout this mod (doors not opening, etc.) requiring the utilization of 'noclip' cheats in more than a few parts of all maps. The VERY ENDING had no end; that is, I was unable to officially finish: After I took down the helicopter.....there was nowhere else to go: I utilized a 'noclip' cheat to traverse throughout the last portions of the map....and there were no more locales available that I had not traversed...I apparently was unable to reach the very end, hence.

Mostly because of this, I rate "Uncertainty Principle" a 7/10.....when it could've been easily an 8.5 or higher out of 10.....

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keithnz
keithnz

Excellent HL2 MOD @ alastair toft
Very impressive , really enjoyed it , good job man !
Cheers
Keith
New Zealand

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gdogamer2
gdogamer2

i can't see it in the library

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CaptPatrick01
CaptPatrick01

And here I am, waiting patiently to see if it would work on MMod.

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CaptPatrick01
CaptPatrick01

Update: It has an MMod patch now. Works great!

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ZippyS2
ZippyS2

Full gameplay

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gdogamer2
gdogamer2

i can't see the mod in the steam library can you help me?

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ZippyS2
ZippyS2

Make sure you had install correctly and restart steam and set sdk 2013 to upcoming.

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Guest
Guest

I love this mod.

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saivert
saivert

Is it possible to port this to Source SDK 2013? You have access to all game assets anyways.

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Half-Life 2: Episode Two
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7.8

38 votes submitted.

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Highest Rated (2 agree) 9/10

I feel like this was an extremely good and well-polished mod. This mod has a lot of the feel of original Half-life 2 and episodes, and left me feeling good throughout most of it. The settings this provided were great, there were some nice little secrets around a potential conspiracy theory, and everything had a polish that I kind of expect from Half-life 2 itself. Not perfect, mind, but to the point where it felt like it could have been canon. There were some areas regarding things being climbable…

Jan 19 2016 by thedeadcamper

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