Hi Mihail, I don't know how you would change the starting positions of the ghosts or their behaviours. I found the following interesting and useful. http://gameinternals.com/post/2072558330/understanding-pac-man-ghost-behavior I suspect you will have to look at the ROM code and then edit that in order to achieve your goal. I don't know how to do this or how to start. I'm sorry I cannot be more helpful. What you are asking for is not something I anticipated and nor something I would need to achieve. I wrote a tutorial on how to implement PacMan as a bit of fun - not as a serious piece of FPGA work. http://simonowen.com/sam/articles/pacemu/ I am not great at assembly level programming so I'm bowing out at this point! Good luck!