So i can't even pass the begging:

The version of the game says 1.2.3, however the change log only goes to 1.2.2, so I'm confused on that part. Secondly, when i start the game everything goes as it should but then as i create a new map that's when it goes down hill. The walls flicker on and off when I look at any direction but when I hold still sometimes it returns to normal other times it gets ruined. Next, the lightning in the beginning is very dark but for other ppl on YT they have a lit up introduction. Lastly, when I'm in the middle of the first hallway the guard stops at the door, doesn't say anything, then continues blocking the story from progressing. Thanks for any patches or help.

I can't even start the game without it telling me that it can't find a specified file.

Windows 8, 8.1, and 10 have a multitude of compatibility issues with Containment Breach. You can refer to the MAV fixing thread (if that's what you're experiencing). It's due to Blitz3D (the games' engine) being heavily supportive of DirectX 7. Most modern PC's have poor support for that, and really just heavily support every DirectX 8+.

Primextreme69 wrote:I can't even start the game without it telling me that it can't find a specified file.

Re-download the game. Specify the error and what you're missing.