The Adventures of Elliot The Millennium Tales has demo-to-full save transfer language on Steam, but full cross-save across every platform is not confirmed.
Confirmed save detail
The Adventures of Elliot The Millennium Tales cross-save is not the same as the Prologue Demo save transfer. Steam notes that demo progress can be carried into the full version, which is useful for PC demo players.
Not confirmed yet
Official material checked for The Adventures of Elliot The Millennium Tales does not currently confirm universal cross-save between Steam, Xbox, PlayStation, and Nintendo Switch 2. The Xbox Play Anywhere listing may support Xbox ecosystem ownership features, but that should not be stretched into every-platform progression.
Practical advice
Choose your main platform as if your full-game save will stay there. If Square Enix or a store page confirms broader The Adventures of Elliot The Millennium Tales cross-save support, this page should be updated with the exact platform scope.
Keep going with the right next check
The Adventures of Elliot The Millennium Tales questions usually connect across release, platform, demo, gameplay, and video details. Use these next steps to keep the buying or demo path clear for The Adventures of Elliot The Millennium Tales.