To start off, I'm going to post a small game I've made while developing my main project. It's a simple first person shooter. Just kill snowmen. That's it.
It uses Irrlicht as a rendering engine, PhysX as the physics engine, Lua (via CaLua) for scripting, Audiere for sounds and music and that's about it.
Technically, you can also play an extremely low-level RTS game with that, but I won't tell you how yet

You'll notice that physics aren't very nicely tweaked and that some enemies might (will) fly around or hit the ground weird.
Download:
http://nightlair.sourceforge.net/corsai ... /snow.html
You will need the Ageia PhysX Drivers...
Quick Tip:
You can toggle through the 3 weapons in the game via 1,2,3. 3 (Flamethrower) doesn't do any damage though.
Oh, and if the game crashes, dies, stops responding, etc... it's not normal but fairly common sadly.
As for screenshots, here's 1:
