Always ensure you are using the most recent build from GitHub.
If HMM is set up but the mods still won't trigger, check these three culprits: Check the Mod Order sonic generations mods not working link
Sonic Generations is an older title. Ensure your PC has the DirectX End-User Runtimes installed. Always ensure you are using the most recent
Go to the "Codes" tab in HMM and disable everything. If the game works, re-enable codes one by one to find the one causing the conflict. 4. One-Click Mod Installation Links Not Working? Go to the "Codes" tab in HMM and disable everything
Click it, then restart your browser. Now, clicking links on GameBanana should automatically trigger a download inside HMM. 5. Verify Game Files If all else fails, your base game files might be corrupted. Go to > Library . Right-click Sonic Generations > Properties . Select Installed Files > Verify integrity of game files .