According to details on YUPLAY and GOG.COM , the Digital Special Edition is essentially a "Collector's" bundle that includes:
: Composed by David Fenn, which is often cited as a highlight for its atmospheric quality.
: Fights rarely last more than 30 seconds; you either win instantly or die and restart from a checkpoint. Is the Special Edition Worth It? titan-souls-digital-special-edition
: High-resolution assets showcasing the game's 16-bit inspired aesthetic. Desktop Backgrounds : Custom wallpapers for your PC. Community Perspectives
If you're interested, I can look up the for the Special Edition or suggest similar boss-rush games if you're looking for a specific challenge level. Titan Souls: Digital Special Edition - GOG.com According to details on YUPLAY and GOG
Reviewers from sites like GOG.COM and IGN emphasize the following:
“If you aren't enjoying yourself immediately after starting up the game, you won't like it at all, because there is nothing else here.” GOG.com Titan Souls: Digital Special Edition - GOG
“You need an abundance of patience and a tinge of masochistic tendencies to enjoy it, but Titan Souls is a refreshing return to the brutal boss battles of yesteryear.” GOG.com