[ART] How would I import this?

[Your Computer]

Hmmm... but HPL2 model viewer only recognizes one object. If I create more meshes inside that 1 object, model viewer recognizes it, but if I get out of edit mode in Blender, and add a new mesh as a new object, model viewer won't detect this new object when export it as a collada.

Is this how it's supposed to be?

That's not how it is supposed to be, but i wouldn't recommend the model viewer for testing out your models, only for generating material files for your models. Before exporting you should be applying location, rotation and scale to all your meshes. You should also be triangulating your meshes before export. And on export making sure you have the correct export settings checked.

Further reading: http://wiki.frictionalgames.com/hpl2/thi...3d/blender