I played the original. It was an excellent castle building simulator. If you want SimCastle, buy it, if you want an RTS, there are better options.
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It is an excellent game........if you have a computer than can manage it. I play it on my Inspiron labtop an even then it lags sometimes, but when you get the feel for the game, you will put it in your hall of fame for RTS. Definetly worth it.