Most of the examples work, but I haven't tested them all yet.
I'm using Raspbian Buster, AGK-Classic
I managed to get it working by downloading AGKTier2-master from TGC's github respository.
Link:
https://github.com/TheGameCreators/AGKTier2
1) Download AGKTier2-master
2) Build interpreter-linux, found in AGKTier2-master/apps
3) Rename LinuxPlayer32 to PiPlayer
4) Replace PiPlayer with the original PiPlayer in Tier1/Compiler/interpreters
You'll be able to run and build the examples using the editor.
Only one issue is with 3D examples, I don't know why the colour is green for the whole 3D scene,
possibly something to do with shaders but I don't have any experience with that, will keep digging to find out
why.
If anyone can solve this issue please let me know