ok
i having a problem that y i cant get into the third room i just stuck at the small window?
y?

The small window?? you mean those panels you can detatch and use as a shield??

there got two energy ball machines shooter in the tunnel that shoot the pulse rifle secondery fire .i suck one ball then shoot at the receptacle then after the machine come out then it stop again.

Are you on about where you put the energy ball in the socket, the thing comes out of the ground fires at the core then fails?

yes that the place i cant get in.
how to get in there?

Well if you look beind the thing, theres a hole in the ground which leads to a room of 3 power sockets, take 3 power balls from the shooty tunnel bit and put 2 of them in the sockets, the 3rd one you have to shoot into the socket by standing next to the hole you came in through.

ooo
i see thank you

np, have fun these are great games