Nowadays, games being released in 1 or 2 discs is considered normal (for example, RDR2 for PS4/Xbox One in 2 50GB Blu-ray discs and GTA V for the Xbox 360 was 2 9.5GB DVDs), but I remember that around the PS1 era games were released in a big number of discs (Final Fantasy 8 & 9 for the PS1 was released on 4 CDs).
What console game has ever been released in the highest amount of discs in total? Only actual game discs count (aka no Soundtrack, Demos or Movies) unless is used by the game in some way.