There’re also the leftover remnants of its console heritage to consider. The menus ask you to press the green and red A and B buttons on your Xbox controller. They are, of course, the A and B keys on your keyboard. Or you could use a PC-adapted Xbox controller instead of a mouse and keyboard, and that might not be a bad idea, so poorly balanced for mouse play is this beast of lore.
There’s something else that’s a little troubling about Halo 2, and that’s the inclusion of Microsoft’s “Live” architecture for online play. Halo 2 has been bolted into Microsoft’s plan for online gaming - the same plan that they’re using for the Xbox. It’s a tried and tested interface that serves the consoles well, but on the PC it seems like more unnecessary fiddling. We just want to be able to load a server browser and start playing, just like we’ve done for years.