Grand Theft Auto III: 10 Year Anniversary Edition is now available for select iOS and Android devices on the Android Marketplace and App Store for $4.99. A list of supported devices is below.

Apple iOS Devices: iPad 1 & 2, iPhone 4 & 4S, iPod touch 4th Generation 

Android Phones: HTC Rezound, LG Optimus 2x, Motorola Atrix 4G, Motorola Droid X2, Motorola Photon 4G, Samsung Galaxy R, T-Mobile G2x 

Android Tablets: Acer Iconia, Asus Eee Pad Transformer, Dell Streak 7, LG Optimus Pad, Motorola Xoom, Samsung Galaxy Tab 8.9 and 10.1, Sony Tablet S, Toshiba Thrive

Since I do not have a fancy new generation iOS or Android device, I tried running it on my iPhone 3GS. It does run on the 3GS though it does have trouble keeping a stable framerate, hence the reason it's not officially supported on the 3GS. However, from what we can gather from numerous people, the game runs flawlessly on supported devices and looks beautiful. Better news is that most of the file formats are the same as the original Grand Theft Auto III on PC, meaning that modding is possible.