Sonic 3 A.I.R. frequently updates its engine, which sometimes changes how global variables (like global.rings ) are handled in the Oxygen script compiler.
: In some versions, if you have both Sonic and Tails on-screen, you can use Debug Mode to place a ring directly onto Tails repeatedly to gain up to 900 rings. Installing Mods for Sonic 3 A.I.R. sonic 3 air mod infinite rings work