This oddity seems to affect Aliens vs. Predator 2 (also a Lithtech game) as well. I recently switched monitors from a 1080p monitor to a 4K monitor. Given how HUD scaling often is with these older games, I probably will just stick to 1080p anyways, but I wanted to see how the game looked at 4K anyways. But for whatever reason, anytime I input a 4K resolution, the game crashes. The really weird thing is AVP2 doesn't run very well at fullscreen (thankfully NOLF1 and 2 don't seem to have that problem) and when I run that game Windowed, 1920x1080 actually fills up my whole screen windowed while 4K just crashes.
I presume the issue is the engine thinks 1080p is still the fullscreen size and therefore 4K resolutions are pushing beyond what the screen can do, but I wonder if anyone else has ever ran into this issue when upgrading monitors, and if so, what's the solution? Like I said, I'll most likely be sticking with 1080p for the foreseeable future with these games since their HUDs don't scale well to that high resolution, but this is a strange issue to begin with.