Rovio Mobile Ltd. is releasing a "lighter weight" version of Angry Birds for handsets with older hardware: Rovio Updates Angry Birds Compatibility List, Will Develop a “Lightweight” Version | Android Phone Fans . The list includes our Sprint HTC Hero. Up until the last update of Angry Birds, I could not even see it in the market. I had to sideload it. The latest version with the advertisements is pretty unbearably slow but the graphics are good compared to the previous version. This "lite" version should be a Godsend. I cannot wait.