Thread:Merrygoroundoflife/@comment-32389776-20180206145458/@comment-5754239-20180206162142

The official Grand Dad Mania game was meant to be a remaster of Sonic Mania that replaced the existing Sonic characters with new modded characters with different abilities. That Grand Dad Mania is still cancelled.

There is a fan-made revival of the game is a mod that is being developed, yes, but it is not officially from SiIvaGunner, and it only replaces sprites and visuals from the game (I.e. you won’t see any mechanics changes). This revival is written about in a section on the Grand Dad Mania article.

EDIT: The original GDM was a full game, not a mod.