The Void

Native for most resolutions, .ini required for 1680x1050.
Display width and height must be multiples of 4 for any resolution to be natively supported and available from the config app.

1680x1050 support is a known issue, but there is a work-around detailed on the official developer's forum. Refer to Links for Official Solution.

For 1680x1050: (from the official solution)
1) Navigate to the data subfolder of the game's install rep, should be sth like C:\Program Files\bitComposer\The Void\data
2) Create a new text file and copy/paste the following into it:
Code:
<?xml version="1.0" encoding="utf-8" ?>
<Renderer>
<Width>1680</Width>
<Height>1050</Height>
<Antialiasing>3</Antialiasing>
<Anisotropy>16</Anisotropy>
<TextureQuality>0</TextureQuality>
<LightmapQuality>0</LightmapQuality>
<NoTwoSidedStencil />
<HDR/>
</Renderer>
3) Save the file as rcfg.xml and launch the game.

This is probably unrelated to widescreen, but you may also need to lower the level of antialiasing for some resolutions to work.
1440x900 (native) and 5040x1050 (ini) both require zero AA to run on my setup, although 1680x1050 (ini) works fine even with 16x AA.

No HUD stretch