It looks like you're referencing a file name associated with a Nintendo Switch game dump (“SONIC X SHADOW GENERATIONS”) in XCI format, hosted on 1Fichier, with a split or part number “01”. This typically indicates a pirated copy of the game.
Q3: Why do some searches add “01” after the file name?
Sites split large XCI files into .001, .002, etc. “01” is the first piece. Joining them requires tools like 7-Zip or HJ-Split.
Expert Perspective: Reviewers from IGN and Nintendo World Report note that while the Shadow portion is short, it is some of the most polished and creative 3D gameplay in the series to date.
: A graphical and mechanical update of the original 2011 title.
Q2: Will 1Fichier links work on the Steam Deck?
The Steam Deck running Yuzu can open XCI files, but 1Fichier dumps often corrupt on unpacking inside Linux. Not recommended.