most games do look bad outside of their native resolution (or maximum resolution supported). Their are 2 plus sides to that though, increased performance in pc games when running them at lower resolution, and it is a natural form of anti aliasing, basically aliasing (jagged edges on objects) is less noticeable at non-native resolutions.
Sora, FEAR can be ran at any resolution you want by editing the Settings.cfg files screenwidth & screenheigth entries.
TweakGuides.com - FEAR Tweak Guide
check out that dudes guides & website, tons of good stuff on there.