The "Immortal Senpai" achievement was updated to require a run without using any "easters" (cheats/exploits). Bug Fixes:

Players can no longer stun Saiko with a brick while she is "bunny hopping".

Saiko no Sutoka version (also known as Alpha 2.2.8) was a minor patch released on October 31, 2021. This update focused primarily on refining AI behaviors, fixing game-breaking glitches, and introducing new visual status indicators. Key Features and Changes in v2.2.8