Magic: People of the way of magic, use battlemages, archmages, dragons....etc, etc......
Tech: People of the way of technology, use battle machines, horseman, catapults....etc, etc......
The game has a multiplayer feature, but can only play if all players have the same OS. Wine unfortunately cannot support this, and the game will get out-of-sync.
The AI is very basic, but very tough, it will beat you unless you have a good strategy.
If you like(d) this game you might want to join the forums, or maybe just look around in the mods, and download a few that look good.