Alien Shooter: Vengeance

To play with a widescreen resolution go to:
(install directory)\run\maps\ and open "CONST.LGC" find these lines (line 513 & 514):

static int RT_SCREEN_X[] = { 800, 1024 };
static int RT_SCREEN_Y[] = { 600, 768 };

These two resolutions correspond to the in-game settings.
If you wish to play in 1680x1050 it should look like this

static int RT_SCREEN_X[] = { 800, 1680 };
static int RT_SCREEN_Y[] = { 600, 1050 };

Now if you switch to 1024x768 in-game you get 1680x1050.

To enable the HUD:
Go to (install directory)\run\maps\ and find "gamebar1024.men"
Rename the file to "gamebar1680.men" if you are planning to play in 1680x1050.
Note that if you are using 1280x720 use "gamebar800.men" instead, otherwise the HUD will be partially gone.

To switch resolution during the startup sequence (loading screen and a couple of logos).
Open up Registry Editor (Start -> Run -> type "regedit").
Go to: HKEY_CURRENT_USER\Software\SigmaTeam\Alien2\
Change ScreenX and ScreenY to your prefered resolution.