A user named had posted a MediaFire link. The note read: "This is the one. The last version before they ruined the slingshot. Download before it's gone."
Open the sideloading tool and select the downloaded IPA file. Angry Birds 1.6.3 Ipa
With the original Angry Birds removed from the App Store by Rovio (replaced by the remake "Angry Birds Reloaded" or the "Rovio Classics: AB" release), finding old IPA files is the only way to experience the original, ad-free, and un-remastered gameplay. A user named had posted a MediaFire link
To get the IPA from your computer onto your legacy iOS device, you cannot use the standard App Store. You must use sideloading utilities: Download before it's gone
Modern games phone home constantly. runs entirely offline. You can install it on an old iPod Touch, an iPad 2, or even an iPhone 4s, put the device in Airplane Mode, and play forever without a single "Connection Lost" popup.