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SPECIFICTION
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RePlayOS

replayos.com

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Spec score 8.0 #9 of 25 in Emulation Frontends

What it is

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.

Spec sheet

Purpose
RePlayOS is a Linux distribution with a streamlined libretro frontend for emulating classic game consoles, arcade machines, and computers.Read 1 Oct 2026 · replayos.com
Integrations
RePlayOS supports core-managed Link Play multiplayer over a local network.Read 1 Oct 2026 · replayos.com
Maker
Rubén Tomás Alonso, also known as RTA or rTomas, created RePlayOS and describes himself as a C, Python, HTML, and JavaScript programmer focused on Raspberry Pi frontends.Read 1 Oct 2026 · replayos.com
Achievements
RePlayOS supports RetroAchievements in compatible libretro cores and games.Read 1 Oct 2026 · replayos.com
API security
API requests except get_version require the NET CONTROL CODE in the X-RePlay-Token header, while the API itself is plain HTTP rather than HTTPS.Read 1 Oct 2026 · replayos.com
Controllers
The system supports more than 700 game controllers and up to six players.Read 1 Oct 2026 · replayos.com
Display engine
The DynaRes engine provides native CRT timings, on-the-fly timing changes, CRT profiles, dual-screen modes, and LCD game-refresh-rate operation.Read 1 Oct 2026 · replayos.com
Licensing
Most distribution components use open-source licenses, while the frontend is proprietary and restricted from modification, standalone redistribution, and unauthorized commercial use.Read 1 Oct 2026 · replayos.com
Media playback
The built-in Alpha Player multimedia core plays audio and video files, with Raspberry Pi 5 recommended for movies.Read 1 Oct 2026 · replayos.com
Platform limitation
The FAQ says RePlayOS does not work on PC and is developed around ARM architecture and Raspberry Pi devices.Read 1 Oct 2026 · replayos.com
Replay Control
Replay Control is a companion web app that browses games, launches them on the TV, manages favorites, and configures the system over the local network.Read 1 Oct 2026 · replayos.com
REST API
RePlayOS includes a small HTTP JSON API for local or LAN control on port 55356 when network control is enabled.Read 1 Oct 2026 · replayos.com
Support channels
The maker points users to official Discord and Telegram servers for community discussions, support, and updates.Read 1 Oct 2026 · replayos.com
Supported models
The requirements list Raspberry Pi Zero 2, Raspberry Pi 3A/B/B+, Raspberry Pi 4B, and Raspberry Pi 5B.Read 1 Oct 2026 · replayos.com
Target hardware
RePlayOS is optimized for Raspberry Pi boards and supports LCD and CRT screens.Read 1 Oct 2026 · replayos.com

Plans and prices

Public RePlayOS Free latest public version · supported Raspberry Pi models Read 1 Oct 2026 · replayos.com
Pixel Insider $5 a month $ 5 / month roadmap access · RePlayOS beta and release candidates · Discord access Read 1 Oct 2026 · patreon.com

Every RePlayOS plan and price →

Strong points and limits

Strong points

  • Supports more than 700 controllers and up to six players.
  • DynaRes includes CRT profiles and native timings.
  • Replay Control manages games over a local network.
  • Public version is free.

Limits

  • Does not work on PC.
  • The API uses plain HTTP rather than HTTPS.
  • Frontend modification and redistribution are restricted.
  • Metadata scraping is not supported.

Who it suits

RePlayOS suits people who want a Raspberry Pi-based emulation system with support for CRT or LCD displays and multiple controllers. It is not designed to run on PC.

Verdict

RePlayOS is centered on Raspberry Pi emulation, with display controls and a local-network companion app. Its PC limitation and proprietary frontend restrictions are important considerations.

Where Specifiction places it

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