I bought this game few days ago and i had so much fun with it.
TOG is all about medieval warfare. You can do custom battles and command your troops in battlefield with full physics combat or you can play campaign mode very similar to M&B. There are also tournaments and you can do mounted combat.
With my poor cpu i5 3,4ghz i can have up to 30 npcs at same time without any noticeable lag. 60 or even more npcs should be easily possible to some better i7 cpus. https://www.youtube.com/watch?v=rPtqppinJE8&t=83s