I want some help .. monitor turns off during game play?

Gaming can work the graphics card harder as well as the CPU and if there is not enough cooling for either or both, then it can cause the system to lock up like that. You may need to add cooling fans, or get a better CPU heatsink and cooling fan (sometimes the stock ones are not good enough). It's also possible that the stock power supply is not big enough to handle the extra load when gaming and shuts down some of the power (yes, even though the computer still looks like it's running, it's not, especially if you lose the monitor, keyboard and mouse). You may also have a memory issue. Sometimes memory fails under heavy load like when gaming, but works OK all other times.