However, players will still be able to purchase it "via bundles of other iconic Sonic titles on Steam and Xbox", Sega confirms.
The expanded platforming remaster is set to release for the Nintendo Switch, PlayStation, Xbox, and PC on October 25.
Alongside Space Colony Ark, two familiar stages from Sonic Heroes and Sonic the Hedgehog (2006) appear in Shadow's campaign.
The game's official Japanese website seems to be hinting at a new playable variant of Shadow in the upcoming platformer.
The year 2024 is far from over, and here's a list of 30 of the biggest games that will be releasing in the coming months.
Watch Shadow rampage through Space Colony Ark and get dragged into an alternate version of Radical Highway, thanks to Doom's Eye.
The enhanced edition of Sonic Team's 2011 platformer will be coming to Xbox Series X/S, PS5, Xbox One, PS4, PC and Nintendo Switch.
It's been claimed that Sega will be opening pre-orders and announcing a release date for the expanded remaster within 10 days' time.
Here are 30 potential announcements to look forward to in the coming weeks, from long-awaited remakes and sequels to brand-new titles.
The expanded remaster is due out sometime this Fall for PlayStation, Xbox, Nintendo Switch, and PC.
Fans of more focused, linear experiences have plenty to look forward to.
The expanded remaster – which features a new, standalone campaign focused on Shadow – is set to launch sometime later this year.
The costume will be added to the 2D sidescrolling platformer on February 15, and will be free for all players.
Shadow embarks on a quest to defeat the resurrected Black Doom while revisiting painful memories and gaining new abilities.
The remaster of Sonic Generations will also bring a brand-new campaign for Shadow the Hedgehog, along with the returning original campaign.
Leaker lolilolailo says it's "real" and "bigger than what most people think." A reveal is potentially coming at today's State of Play.
PlayStation's next State of Play could see a Sonic-related announcement. It's set for January 31st at 2 PM PST, with 15 titles confirmed.