Video Scaling like in VirtualBox?

Hi,

is it possible to scale the VNC-Desktop like it is possible in Oracle VirtualBox?

I have a old video game that runs in 640x480 and in this native resolution it sucks on a 1440x900 screen. In VirtualBox it is possible to stretch the small screen of the VM to a size that i want.

Or is there another way to do that?

Thanks so far!