Army Men: Operation Green has never been released for PC, so it has no PC system requirements. It came out on Game Boy Advance. Released in 2001.
There is no emulator for Game Boy Advance that this site will point you at.
Platforms: Game Boy Advance.
System requirements for the game Army Men 3D
System requirements for the game Army Men: Air Attack 2
System requirements for the game Army Men: Sarge's Heroes 2
System requirements for the game Army Men World War: Final Front
System requirements for the game Army Men: Green Rogue
System requirements for the game Army Men World War: Team Assault
System requirements for the game Army Men: World War - Land, Sea, Air
System requirements for the game Army Men: Soldiers of Misfortune
