In MK30? How to Play now MK Klassic and MK9. For MK Klassic, it's like SF Games Collection maybe or Arcade 1UP? For MK9, it's no more available in Steam since 2020,
Amazon.com: Mortal Kombat Arcade Kollection - Steam PC [Online Game Code] : Video Games
Mortal Kombat HD Arcade Kollection, 3D support confirmed - Rely on Horror
Mortal Kombat 11: Aftermath Kollection - Playstation 4 – Retro Raven Games
Can't wait to add Mortal Kombat 1 to the collection tomorrow! : r/ MortalKombat