Fatal Freedom: All or Everything is going to be an FPS that uses Irrlicht for graphics. It uses parallax mapping (bump or solid if you need it to run faster), particle F/X, and some nice lighting effects, too. I don't have a demo yet, but there are some screens of it on the screen shot section of
my site.
Fatal Freedom: All or Everything
I just uploaded a gameplay movie of it. The codec is somewhat blurry, so you can't see the enemies too well.