Sigma Platinum requires that you play it on a modded Nintendo Switch with your copy of BDSP- or by dumping the original game from your modded Switch onto a PC, and playing it through an emulator such as Yuzu or Ryujinx. Patch notes can be found above in 'Updates.' A more detailed information dump including all the new features, explanations on new mechanics and individual information can be found in the MASTER DOCUMENT.
It is not a 1:1 remake of Platinum, as some of the issues from that game have been improved. It also includes additional elements to enhance the experience in the style of a traditional GAME FREAK remake, such as Pokemon HeartGold & SoulSilver, or Pokemon Omega Ruby & Alpha Sapphire. 1.3.0)that is designed around Pokemon Platinum. Sigma Platinum is a mod for Pokemon Brilliant Diamond & Shining Pearl (VER.