Well this is odd. For the life of me I am unable to get the game to work in fullscreen mode. Running 3 x 24” screens in portrait mode using Eyefinity (AMD HD 6870 with 2 active MINI-HDMI/DVI). The game can run windowed mode using ratio of 16x10 at 2560x1600 resolution. But set it to fullscreen and all it does is....well it does nothing. Just stays in the resolution it was at keeping fullscreen disabled. The game seemed incomplete when it started up for the first time and all I got was this 800x600 game window to see the intro and character selection.

Current Windows desktop resolution @ 3240 x 1920

How can I force full screen? Does this game not support eyefinty?

Specs:
Driver version: 11-5 win7 64 dd
CPU: Intel Core 2 Duo CPU E6550 2.33Ghz
GPU: Sapphire Radeon HD 6870 1GB
Display: Eyefinity @ 3 x BX2440 (Vertical/Portrait)
Converters: Accell UltraAV B087B-002B DisplayPort/DVI-D Dual-Link Adapter x2
RAM: 4GB DDR2 @1333MHz
OS: Windows 7 (x64)

Still no luck. Really svcks to play like this. On fullscreen the performance is also better.

http://img856.imageshack.us/img856/557/brinkp.jpg
http://img856.imageshack.us/img856/557/brinkp.jpg

Yeah it works! Have full screen on my native resolution. It's not standard but it works...

Ok so i did what the guy suggested on the below thread
http://www.gamesas.com/index.php?/topic/1190000-resolution-not-supported-1366x768/page__view__findpost__p__17679434

Made the autoexec.cfg file in the base folder with these settings
seta r_mode "-1"
seta r_fullscreen "1"
seta r_customWidth "3240"
seta r_customHeight "1920"
seta r_aspectRatio "1"
seta r_customAspectRatioH "16"
seta r_customAspectRatioV "9"

I've put up a more extensive guide on this since my post in that thread was just the basics to help him get his resolution.
http://www.gamesas.com/index.php?/topic/1190103-guide-force-custom-resolution/