After watching my dad playing Call of Duty: Black Ops today I realized something interesting.
Based off my knowledge on Unity3D there's three rendering types I'm familiar with.
Vertex Lit: Instead of lighting pixels it projects lighting based on polygons. Generally used for Gamecube games and stuff.
Forward: Lights pixels but only directional lights (light entities like the sun) can project shadows while point lights (lamps and stuff) can't.
Deferred Lit: Lights pixels and allows all types of light entities to project shadows.
Anyways what I realized that on the map Summit, no shadows were being casted inside buildings. Shadows would only appear outside and seemed to be coming from only one light source which I can suspect is a directional light.
As seen shadows are fine and dandy when you're outside.
But, nop, no shadows indoors.
Conclusion: Black Ops uses Forward Rendering.
Poll