Before the era of "always-on DRM," Version 1.0 required zero internet connection. You could download the APK, install it on an old HTC Desire or Samsung Galaxy S, and play it in airplane mode forever. For those living in areas with spotty data or for long-haul flights, this is a godsend.
Correction for accuracy: Actually, in very early 1.0, the White Bird and Black Bird were not yet introduced. Version 1.0 had only Red, Blue, and Yellow. Bomb and Matilda appeared in Version 1.2. This confirms the primitive state. Angry Birds Version 1.0 Apk
Modern Android versions (12+) often refuse to install APIs targeting SDK 4 (Donut) or 7 (Eclair). To run Angry Birds 1.0, one needs an emulator (e.g., QEMU with Android 2.3 Gingerbread) or a physical device from 2010–2012. Screen resolution assumptions (320x480 HVGA) cause scaling artifacts on modern displays. Before the era of "always-on DRM," Version 1