This game is not related to the story of the Half-life2.
Something goes mad because the human race failed in the
experiment, and it connects with another world.
The resident in the another world is crazy due to the mistake.
We should restore the situation.

User Posted Image

As for this game, almost all are made only from the basic function of HL2.
Having fiddled with the code for the chapter unlock is the only exception.
You will learn the degree of freedom of the expression of HL2 is very high.

K.S.(Koumei satou)

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I released the test patch ver.2 for the CUtlLinkedList Overflow error.

Please try this file, when a problem has not improved, even if it tried "Test patch 1 for CUtlLinkedList Overflow" .
If you are not confronted with this error, the patch need not be used.

:Attention:
To our regret, there is no guarantee that the problem solves by this
patch.
Refer to readme for details.

patch for the CUtlLinkedList Overflow error

patch for the CUtlLinkedList Overflow error

News 0 comments

I released the test patch for the CUtlLinkedList Overflow error. After all, I was not able to specify a detailed cause. But, I have decreased entity...

Version 1.0c released

Version 1.0c released

News 0 comments

I released the patch. As a result, the version becomes 1.0c. I fixed some stucked parts, and fixed the game balance. Please download the ks_mop_v1b-v1c_update.zip...

Thank you!

Thank you!

News 0 comments

Thanks for your voting MOP for Mods of 2005! I'm planning to release a patch which will address a few glitches while tweaking some scenes. "Thank...

Screenshots update

Screenshots update

News 0 comments

Four new Screenshots were added.

RSS feed Downloads
Mistake Of Pythagoras Patch - Source SDK 2013

Mistake Of Pythagoras Patch - Source SDK 2013

Patch 5 comments

This patch fixes most issues related to engine branch incompatibility and is designed to run using the latest "Beta" of Source SDK Base 2013 Singleplayer...

Test patch 2 for CUtlLinkedList Overflow

Test patch 2 for CUtlLinkedList Overflow

Patch 0 comments

:Attention: To our regret, there is no guarantee that the problem solves by this patch. Please try this file, when a problem has not improved, even if...

Test patch 1 for CUtlLinkedList Overflow

Test patch 1 for CUtlLinkedList Overflow

Patch 0 comments

:Attention: To our regret, there is no guarantee that the problem solves by this patch. Please tell it to me if the problem still happens. Refer to readme...

Mistake Of Pythagoras v1.0c

Full Version 13 comments

Please copy this "MOP" folder into your Steam/SteamApps/SourceMods folder. (Please make it in SteamApps if there is no SourceMods folder. ...

MOP update patch 1.0b - 1.0c

Patch 0 comments

The version becomes v1.0c. I fixed some stucked parts, and fixed the game balance. Please download the ks_mop_v1b-v1c_update.zip file if you have already...

Mistake Of Pythagoras 1.0b

Full Version 0 comments

Please copy this "MOP" folder into your Steam/SteamApps/SourceMods folder. re-start Steam. It is a success if "Mistake Of Pythagoras&quot...

Post comment Comments  (60 - 70 of 233)
I_R_Hopo
I_R_Hopo

I remember trying this one a long time ago and never finishing. Glad I re-downloaded it and went through the whole thing. It's.... strange. But good. VERY good. And a good length too. 9/10

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MegaSean45
MegaSean45

The Combines are on our side on here? This must take place after Episode Three.

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pyrohamster
pyrohamster

what do i do in the room with the super gravity gun and all the numbers and little blocks on the ground. after the fight with the giant triangle

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Noski11z
Noski11z

make a square where the rod-thing is sticking out. REMOVE teh rod first tho :3

LOVE the mod too. I never understood the ending tho o.o The whole part before the epic bossfight was AWESOMENESS :D

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Apnissen
Apnissen

I´ve just played it through and I can only say that im impressed.
If only there would have been some more of that great music.
Music:9/10
Gameplay:9/10
Visual:7/10
Total:8/10

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Humanoid333
Humanoid333

Amazing mod. But i'm stuck at the part where the big triangle-ship makes circles of manhacks. Help, anybody?

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ghostings
ghostings

*spoiler, but read since this part will get you stuck if you play*

Look at the wall lined with pylons, if you stare at the pylons on the left wall, one will detach and float in the air. Stare at the flying pylon as long as you can, eventually it will fly at the giant triangle.

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gvazdas
gvazdas

The end of this mod made me cry :)

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yalikescake
yalikescake

this is a very cool looking mod. all of the environments are very well designed. must DL

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Darkcraft
Darkcraft

It is an amazing mod. Parts of it looke beautiful ( Developer.valvesoftware.com ) but some of it does look a bit ugly. Regardless, it is an incredible mod that everyone should play.

The music is really interesting though a bit sparse, I was wondering who created it.

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