Confused about Open source


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There is also other emulator called play!.
Play! is a portable PlayStation2 emulator. The focus of the project is on making PlayStation2 emulation easy and accessible. Just pop in your favorite game's disc and have fun!
  • No BIOS required. Play! is an high-level emulator.
  • Easy configuration. No custom settings to fix specific games.
  • Available on many platforms. Making sure the experience is the same everywhere.

Play! v0.47 is now available. Here's what's new in this build:

- Compatibility improvements: Atelier Marie & Elie and Tairyou Jigoku now go ingame.
- Fixed regression in Mushihimesama. Goes back ingame.
- Fixed sound/music issues in Kingdom Hearts.
- Vulkan: Improved handling of min & mag filters (some games should look less blocky).
- iOS: Added support for AltServer JIT activation. This needs to be enabled in the settings.
- Android: Improved position of FPS label on notched screens.
- Android: Fixed crashes.

Other emulator which also is open source is mednafen:

The following systems are supported(refer to the emulation module documentation for more details):

  • Apple II/II+
  • Atari Lynx
  • Neo Geo Pocket (Color)
  • WonderSwan
  • GameBoy (Color)
  • GameBoy Advance
  • Nintendo Entertainment System
  • Super Nintendo Entertainment System/Super Famicom
  • Virtual Boy
  • PC Engine/TurboGrafx 16 (CD)
  • SuperGrafx
  • PC-FX
  • Sega Game Gear
  • Sega Genesis/Megadrive
  • Sega Master System
  • Sega Saturn (experimental, x86_64 only)
  • Sony PlayStation