This mod will let us into a horroristic world in the Andrew Parker asylum and we will live through (or not) in the view of a mental patient.
The mod's primal object is not the insane bloodbath. The real object is to escape from the huge building which holds a lot of secrets.

The mod have been completed after 3 months. It gives you 15-20 freaking minutes in the horroristic Andrew Parker asylum. The game runs with WON and Steam based Half-Life too.

The mod includes:

- new textures
- new sounds
- new HUD
- new maps
- new menu
- changed and new models

Mistake mod site

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RSS feed Articles

Mistake Maps Promo

7 years ago News 0 comments

I had some free time, so I made a video of the currently done maps, just a little teaser, I hope you'll like it. The maps are very confusing with harder puzzles than old Mistake. ( Have to find a paper with a message to find a furniture with the code for a door, etc... ). The First chapter and a new monster model is also done. Its a dead children instead headcrab. I think it's scary enough. Also I made two new skin to the zombie models.

in progress

Still were looking for a modeller to do some small jobs (5 models)
We need a hand model to weapons and one character model.
Mistake Teaser

Mistake Teaser

7 years ago News 7 comments

The mod is progressing smoothly, I've made a little teaser of the stuff I've got so far. Three maps are already done, many prop models and a few enemy...

We're need a programmer for the mod.

We're need a programmer for the mod.

8 years ago News 0 comments

We're need a programmer for the mod. need to change the full hud, actions of the enemies, create a new melee weapon, modify the flashlight. We almost...

Mistake -1 - new screenshots and modeller !

Mistake -1 - new screenshots and modeller !

8 years ago News 6 comments

We have the complete story. The new episode's events will be the large part of the first part of the Mistake. Reminisences and cross-references make more...

Next part of mistake

Next part of mistake

8 years ago News 0 comments

We start developing the next part of mistake. We continue the story with more enemies, weapons, memos, dialogs. You can see it at or

RSS feed Downloads

Mistake 1.0

8 years ago Full Version 8 comments

Mistake 1.0 Running with steam and won too. Enjoy! XD

Post comment Comments  (0 - 10 of 91)
Half-Rats Apr 8 2014 says:

I'm experiencing.....a crash.

+1 vote     reply to comment
Kimimako Oct 19 2012 says:

I've been trying to play it, but I can't.
Installed it in the Steam folder (within half life folder) but it doesn't work.

+1 vote     reply to comment
Defrostmode Jul 29 2012 says:

I feel stupid, but where do I install this for the steam version?

+1 vote     reply to comment
Defrostmode Jul 29 2012 replied:

nm. brainfart problem solved

+1 vote     reply to comment
Kimimako Oct 9 2012 replied:

How to?
Move the Mistake files to the half life folder?

+1 vote     reply to comment
Salazoi Apr 29 2013 replied:

You have to create Mistake named folder in the half life folder and install it there then it works.

+1 vote     reply to comment
houghtob123 May 12 2012 says:

If you want I can try to model some stuff.

+1 vote     reply to comment
Streloker Jan 13 2012 says:

right now im playing premistake mod which is creepy but i will play this if i cant make game more lighter

+1 vote     reply to comment
Rallymen007 Sep 1 2010 says:

Just finished this mod, quite good, maybe a little too short (but it wasn't supposed to be long). maps are pretty well designed, zombies are well designed, and the atmosphere is really nice.

I'd recommend this mod if you want to fight some zombies with your knife, or have 20-30 minutes of free time to spend.


+1 vote     reply to comment
Miroki_Wolf Aug 21 2010 says:

Man...This mod is Awesome...
Those cameras and red screen...

+1 vote     reply to comment
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Release date
Released 2007
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Last Update
7 years ago
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