If you haven’t picked up Sonic Mania now is your chance. The online game launcher Epic Games has just announced that Sonic Mania will release on their launcher on the 24th of June and will be free for a limited time.
From the 24th of June until the 1st of July. It is unclear if this also includes the encore dlc but it can be assumed the dlc won’t be free.
The store can be found here.