My room mate and I want to play through Star Wars Battlefront II's story campaign together on the PC. Is this possible via mods or download maps? The game supports Co-op on Xbox and PS2, but there is only fleeting mentions of co-op possibilities on Google for PC.
No, as far as I could find anywhere there was no mod or add-ons that allowed you to do that. I'll keep on looking for it, and I'll get back to you if there is anything I find, but it's very unlikely- It's an old game and nothing new is likely to come up for a game released that long ago.