Yes you can, depending on how you do it
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You actually can play Combat Arms with a controller. But it has to be a(n) XBox 360 controller since it has a USB slot. But you may have to set up the controls. I recommend using the basic mouse and keyboard, the Controller is more difficult and harder to control.
according to my research combat arms can be played on a controller but its a 360 controller from what ppl r saying..so for i have no found a way with any other controller Edit: Get Xpadder, and run it. Get a Controller-USB converter (I use FT8D91) and plugin the controller. Install any software required to use the hardware, and set up a new controller profile on Xpadder. Calibrate the buttons and create a controller configuration for Combat Arms. Assign the various keyboard buttons used in Combat Arms to the Controller profile. save it, and have fun playing. (You might need to search for video tutorials on how to calibrate a controller)
No it's a PC game
I don't know because I have a A.V.A account, it has great graphics and awesome weapons. You should forget about combat arms and play alliance of valiant arms.
That has not happened to me so i believe it doesnt. your computer requirements may be running out as you have to download more combat arms content.