It's actually a good contrast to the biases of id tech 4 - bright, huge scale outdoor landscapes and arenas with hundreds of AI opponents vs. dark interiors wit

It's actually a good contrast to the biases of id tech 4 - bright, huge scale outdoor landscapes and arenas with hundreds of AI opponents vs. dark interiors with mood lighting and smaller engagements. It's an early example of heavy usage of "modular" model instances to add detail instead of relying on brush geometry to do everything. There are plenty of nifty features like split screen. From an overall technology standpoint, both engines should prove worthy of study given the radically different focus.