FOV too low? Serious Sam HD has a very narrow default Field of Vision that was likely meant for 4:3 monitors. Open the SeriousSamHD.ini file located in Steam/userdata/(userid)/41000/local and add the following command that corresponds to your monitor's aspect ratio:
For instance, if you have a 1920x1080 monitor, then you would add the line: Make sure you set the .ini file to Read-Only, or else it will revert back to default the next time you boot up the game!


As you can clearly see, the effect is quite noticeable and will make a huge difference in the middle of an enemy horde. You will no longer feel quite as nauseous or claustrophobic.

Thanks for reading my guide. I'd like to give credit to WSGF for the FOV scaling values which I found in their helpful "Half-Life (Non-Steam)" guide.