They weren't.
“I tried angry birds project r and is fun also did someone tried this angry birds mod???” Reddit · r/angrybirds · 8 months ago angry birds project r download android repack repack
“I wanna relax after the hell I went through, mainly the hard levels.” Reddit · r/angrybirds · 6 months ago Safety and Installation They weren't
When you see "Repack" in the filename (e.g., Angry Birds Project R Repack.apk ), it usually means: Angry Birds Project R Repack.apk )