Lakka vs RePlayOS

Lakka is a lightweight Linux distribution that turns a small computer into a retrogaming console. It is built on LibreELEC and RetroArch, with RetroArch serving as its graphical interface and providing unified emulator configuration and joypad autoconfiguration. Listed features include automatic controller recognition, rewinding, netplay, and shaders. Official builds target Raspberry Pi, Allwinner, iMX6, Amlogic, and 32-bit and 64-bit PC systems. Installation uses USB images specific to the target hardware, and installation instructions cover GNU/Linux, Windows, and MacOS. The PC version is intended for dedicated hardware and does not support virtualization, dual boot, or CD and DVD installation. Users must supply their own ROMs; documentation also covers BIOS files. Netplay requires both players to use the same ROM, and cores without savestate support cannot use it. Lakka is community-driven and open source, and the listed price is free; required hardware is not included. The project says it remains under heavy development, so bugs, missing features, or unsupported hardware may occur.

RePlayOS is a Linux distribution for emulating classic game consoles, arcade machines, and computers through a streamlined libretro frontend. It is built around Raspberry Pi hardware, with listed support for Zero 2, 3A/B/B+, 4B, and 5B models, and works with LCD and CRT screens. Its DynaRes display engine supports native CRT timings, timing changes, CRT profiles, dual-screen modes, and LCD operation at game refresh rates. The system supports more than 700 controllers and up to six players, plus RetroAchievements in compatible cores and games. Replay Control is a companion web app for browsing games, launching them on a TV, managing favorites, and configuring the system over a local network. Compatible cores can use Link Play multiplayer over that network. Alpha Player handles audio and video files, with Raspberry Pi 5 recommended for movies. A small HTTP JSON API provides local or LAN control when enabled, but uses plain HTTP. The public version is free; the frontend is proprietary, with restrictions on modification, standalone redistribution, and unauthorized commercial use.