I think the biggest problem with the Dark Forces "series" was that they waited so long to add multiplayer. The excuse was always "well, it wouldn't make sense to have Jedi fighting each other or to have Han fighting Leia". Um, who cares if it makes sense, it's a game. When they finally did go multiplayer, it was JK2 which was essentially just Jedi vs Sith. I don't believe they ever made Stormtroopers or anyone else playable characters. I know there were mods for Quake 3 that had stormtroopers, chewie, etc, etc. LucasArts just seemed to be stuck in this mentality of trying to make all the games fit into continuity. That is until Masters of Teris Kasi, which they had to wedge continuity into.