This is a specific level (world) within Super Mario Odyssey on the Nintendo Switch.
Nintendo games are exclusive to their hardware. Any " Ruined Kingdom Free Download" for PC claiming to be this Mario level is either an unauthorized emulator setup or a scam. The Risks of Illegal Downloads Ruined Kingdom Free Download
This is a standalone real-time strategy (RTS) and reverse tower defense game where you lead an army of orcs to defeat humans. This is a specific level (world) within Super