can I scale up screen pixels?

Hey, I'm looking for ways to create an old school retro rendering style for my game. What I want to do is scale up a game with 320x200 resolution to 640x400 or higher, so the individual pixels become large and visible. Is there any way to do this in unity? I'm guessing this could be done with post processing? Thanks!

If you have pro you could do it with an image effect, scaling down the rendered 640x400 image to 320x200 and then scale it up again. If you just want to achieve a pixelated look you could also try to downsize all your texture assets and use "Point" as filter mode.