Nexen vs OpenEmu

Nexen is a free, open source multi-system emulator for Windows, Linux, and macOS. It lists eight fully supported systems: NES, SNES, Game Boy and Color, Game Boy Advance, Master System and Game Gear, PC Engine, WonderSwan, and Atari Lynx. CPU and PPU emulation is cycle-accurate, with full coprocessor support listed for several SNES chips. Each game can have unlimited timestamped saves, a visual picker, and 36 rolling checkpoints at five-minute intervals. Movie tools support frame-by-frame recording and playback, rerecording, and imports and exports for BK2, FM2, SMV, LSMV, VBM, and GMV files. A TAS editor provides a piano-roll timeline, undo and redo, greenzone seeking, alternate branches, and Lua scripting. Debugging tools include a disassembler, memory viewer, breakpoints, trace and code/data logging, and a profiler. Nexen also lists rollback netplay and exports symbols, code coverage data, cross-references, and source maps to Pansy for the Flower Toolchain. Sega Genesis, Atari 2600, and Fairchild Channel F support remain in progress.

OpenEmu is free, open-source video game emulation software for macOS. It organizes game backups into a unified library, adds box art and supports collections spanning consoles. Users drag and drop backups for scanning and organization. Modular cores from open-source projects emulate systems including Atari, Game Boy, Nintendo, Sega, Sony PlayStation and Super Nintendo; the project lists 31 supported systems. Generic HID-compliant USB or Bluetooth controllers can work immediately, with automatic mapping for recognized devices. OpenEmu is intended for games users already own, and BIOS files are required. The wiki describes an experimental arcade core plugin that is strictly unsupported. The latest release page identifies OpenEmu 2.4.1 binaries as Intel-only. The official site offers a macOS (OS X) application, but the version requirement was not rendered. The project lists save states, CD audio and cheat support, while online netplay is not available.