This game has a few technical issues. Widescreen is broken by default and the maximum horizontal resolution is limited:

https://www.pcgamingwiki.com/wiki/Dark_Sector

There are also stability issues, especially on modern hardware. It's not a particularly great game anyway, not even by the standards of AA games from the 360 era. I would only recommend it to die-hard fans of Warframe who want to see some early versions of assets and designs they are used to. IIRC, some assets are even identical. At least it's very short.

I'm not ashamed of my pile of shame. Will add the game to my library. Thanks.