The game starts alright but the menu lags slightly. The fmv plays alright but when the game starts it lags to the point of unplayability. My mouse moves really slow and I cant move my character at all. Im playing on a Lenovo y510p.

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System Information
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Time of this report: 8/13/2014, 05:00:24
Machine name: DUCKY-2
Operating System: Windows 8 Single Language 64-bit (6.2, Build 9200) (9200.win8_gdr.140502-1507)
Language: English (Regional Setting: English)
System Manufacturer: LENOVO
System Model: 20217
BIOS: 74CN34WW(V2.04)
Processor: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (8 CPUs), ~2.4GHz
Memory: 8192MB RAM
Available OS Memory: 7986MB RAM
Page File: 4155MB used, 6279MB available
Windows Dir: C:\windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 120 DPI (125 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.02.9200.16384 64bit Unicode

Thank you so much! It works great, apart from the occasional crashes.

The suggested solution only forwards you to this recipe:

steamcommunity.com/app/260730/discussions/0/540737262306815107/

Following exactly this solution works pretty fine for me and makes the game playable under Windows 8!!!

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The game was unplayable in Win8 before.

First the graphics were totally broken so I couldn't even recognize the game menu.
Not sure what fixed this but after having installed old DirectX Versions 7/9 in the meantime graphics suddenly worked.

However, mouse movement in general and animations in the game are deadly slow making the game UNPLAYABLE.
The recipe using DXWnd fixes this problem.

The only downside is occasional flickering and told of but yet unexperienced occasional crashes.
Still, the game was made playable.