today im instal demo version of this game, in cimp of my friend, and game can not start, when i try the  game has been stop work, os is windows 8.1  , and i waant to purchase but where i can check how it cost?

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Hello.
You can try this thing.
1. Click control panel.
2. Click system and security.
3. Click system.
4. Click advanced system setting.
5. On the performance tab, click settings.
6. On the tab control, select data execution preventions.
7. Click turn on DEP for all programs and services except those I select.
8. Click add.
9. Go to where your install your entombed. For example. C:\programs files\entombed. Note: if your os is 64 bit, the path is c:\programs files( x86)\entombed.
10. Prest enter on entombed or entombed.exe.
Restart your computer if nesosory.
Hope it help

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