Game console won't shut down

[thunderbolt1164]

Have just re-installed Kubuntu (have been gone awhile), did updates and installed some games.
Games seemed to work fine Until I went to close them. Clicking Exit closed the game , but left the Black Console window open, clicking on the red X doesn't do anything. The only thing I can do with it is Minimize it.
Is there anything I can do to shut them down with out rebooting?

[reed9]

What games?

A couple of ways to kill a stalled program.

Press ALT+F2, type xkill, click on the window/program you want to close.

For processes or programs running in the background, I like to use htop. You may need to install it first, I'm not sure if Ubuntu has it by default.

Type htop in a terminal window. It will come up with a list of what's running. Navigate to the program you want to kill, press F9 and Enter. You'll see a list of all the options and such on the bottom of the htop screen.