ChillyGB vs SkyEmu

ChillyGB is a free Game Boy (DMG) and Game Boy Color (CGB) emulator written in C. It is listed for Windows, Linux, and Nintendo Switch, and the project links to a WebAssembly browser version. Supported cartridges include no MBC, MBC1, MBC2, MBC3 with a real-time clock, MBC5, MBC7, and Pocket Camera. Features include Game Boy Color and BootROM support, BESS-compliant save states, a palette editor, integer scaling, a pixel grid, color correction, and GameGenie and GameShark cheats.

Players can use basic gamepads and edit inputs; Pocket Camera support can use a webcam. The debugger includes instruction, memory, stack, and register views, plus editors and status information for listed PPU registers. The project excludes SGB functions, MBC6, HUc1, HUc3, and infrared communication. Link cable emulation and netplay are not supported. The browser port's audio is noted as buggy. ChillyGB is licensed under GNU GPL v3.0; release 0.3.2 is listed as latest, and save states from before version 0.3.0 do not work with it.

SkyEmu is a free emulator for Game Boy, Game Boy Color, Game Boy Advance, and Nintendo DS systems. It runs on Android, iOS, Linux, macOS, web, and Windows, and can load ROMs compressed in ZIP archives. Graphics options include upscaling shaders, color correction, and screen ghosting. Controls include game controllers, rumble, configurable keybinds, and mobile on-screen controls. Four persistent save-state slots include screenshot previews. A REST-like API supports asynchronous scripting and automation, and listed integrations include Retro Achievements, a RetroArch/libretro core, and Google Drive save-state sync. The web app runs locally using WebAssembly and JavaScript, keeping files on the user's machine; its service worker enables offline use on more platforms. The project describes its focus as preserving these systems for future generations while providing a good user experience. It says Game Boy Advance emulation is significantly more accurate than its Game Boy and Game Boy Color emulation. Many Nintendo DS games still have mild graphics and audio issues, and DS emulation is beta quality.