Instruct: Classify Amazon reviews into positive or negative sentiment
Query: For the price it's not woth something so old

This book is probebly the biggest rip-off, the engine has so many bugs it isn't funny, the windows version hardly runs because of it's bugs and the map editor crashes, and when it doesn't crash the maps it saves are invalid! Definatly not worth the money. The engine is very old, it uses WinG which is for Windows 3.1 and has the same restrictions as Wolfenstien 3D. You also can't contact the author for updates and I've tried the publishers but they can't reach him either. In short, too old, too buggy, and no support or updates.