Rock Band 4 has never been released for PC, so it has no PC system requirements. It came out on Xbox One, PlayStation 4. Released in 2015.
There is no emulator for Xbox One, PlayStation 4 that this site will point you at.
Platforms: Xbox One, PlayStation 4.
System requirements for the game Stardew Valley
System requirements for the game Hitman
System requirements for the game Garry's Mod
System requirements for the game Don't Starve Together
System requirements for the game Cities: Skylines
System requirements for the game No Man's Sky
System requirements for the game Among Us
System requirements for the game Crusader Kings II
