Most games with 4:3 aspect ratio are stretched in full screen like starcraft, Age of Empires II, Vampire The Masquerade: Redemption, Panzer General II , Fallout 1 & 2, etc.
It's because they are old games that were created years ago when 4:3 was the main screen ratio. They just were'nt designed to adapt on multiple screen ratio...
Now things have changed, you have to make your game adapt the screen ratio.
Here are two screenshot of the same game, on iPhone and iPad.
iPhone is around 16:10
iPad is 4:3
iPhone :
<img src="https://dl.dropboxusercontent.com/u/5129970/constructforum/Photo%2021-04-13%2018%2027%2002.png" border="0" />
iPad :
<img src="https://dl.dropboxusercontent.com/u/5129970/constructforum/Photo%2002-04-13%2019%2003%2024.png" border="0" />
So how does the same game adapt from a wide ratio to a 4:3 ratio that is taller ? Without black bars and without stretching ? By showing more graphics up and down. Here it's the ceiling and the floor but it can be more sky, ground or whatever... But never stretching