Flycast

Flycast Dojo is a free, open-source fork of Flycast for Dreamcast, Naomi, Naomi 2, and Atomiswave emulation. It is best suited to players who organize retro multiplayer, review matches, or need dedicated training tools rather than a basic offline emulator. The main trade-off is that online play depends on matching ROM and BIOS files and a network that allows the chosen connection method.

Overview

Dojo keeps the multi-platform emulation foundation of Flycast while concentrating on netplay, replay, and tournament-oriented quality-of-life features. Downloads cover Android, Linux, macOS, and Windows, and graphics upscaling is supported. It can also run offline, so training does not require a live opponent.

Players must supply appropriate ROM and BIOS files. For peer-to-peer sessions, both opponents need identical game files; MD5 checksum comparison provides a practical way to verify ROMs before trying to connect. The emulator does not remove that file-management responsibility.

Key features

Multiplayer connections

Match Codes start peer-to-peer sessions through an internet matchmaking relay. They can get players behind many firewalls connected without an account, extra software, a virtual LAN, or a separate matchmaking service. That is the most convenient route for many home networks, although some cloud-gaming services and corporate networks can still interfere.

Direct IP connections are available for users who control their network setup, while virtual LAN tools such as ZeroTier or Radmin offer another way to present players as if they were on the same network. Firewalls and antivirus software may block connections; allowing Flycast through the firewall or forwarding ports can be necessary troubleshooting steps.

Dojo is bundled with Fightcade, an online matchmaking service for retro games, and with Arkadyzja, whose platform uses Dojo's peer-to-peer and relay capabilities. These integrations broaden the ways players can find or join sessions, but they do not remove the requirement for compatible game files.

Replay and spectating

Netplay sessions can be recorded and replayed from the emulator's Replays screen. That makes it useful for reviewing tournament rounds, studying mistakes, or preserving matches instead of treating multiplayer as a one-time event. Sessions can also be transmitted to a replay server or to a listening spectator, supporting organized viewing and event workflows.

Offline training

Training Mode supports RetroArch .cht cheat files, savestates, and recording and playback of inputs in supported games. These tools let players practice repeatable situations offline and inspect execution without another participant. Support is game-dependent, so it is not a universal replacement for a dedicated training mode.

Pricing

Flycast Dojo is free, with no paid tier or subscription. That makes the full feature set accessible to casual players, tournament organizers, and developers evaluating a netplay-focused emulator without a purchase decision. You still need to obtain your own compatible ROM and BIOS files, and the software does not solve network or file-compatibility problems for you.

Platforms

Flycast Dojo supports Android, Linux, macOS, and Windows. The broad desktop coverage suits mixed-platform groups, while Android support gives mobile users the same emulator project. The official downloads cover Windows, Linux, and Mac; platform-specific setup and network behavior can still vary.

Who it's for

Choose Dojo if online play is central to your use of Dreamcast, Naomi, Naomi 2, or Atomiswave emulation, particularly when you want relay-assisted connections, replay files, spectating, or tournament-style training. It is also a strong fit for players who want offline practice with savestates and input playback.

It is less suitable if you only want the simplest possible emulator launch, do not have legally obtained matching game files, or play from a network where Match Codes are blocked. Users who prefer to manage connections entirely through a standard emulator may find Dojo's extra netplay options unnecessary.

Pros and cons

• Pro: Match Codes can establish peer-to-peer play through a relay without accounts, extra software, or a virtual LAN.
• Pro: Replay recording, playback, and spectator output support match review and organized events.
• Pro: Training Mode combines cheats, savestates, and input recording for offline practice in supported games.
• Pro: Free, open-source software spans Android, Linux, macOS, and Windows.
• Con: Players must provide appropriate ROM and BIOS files, and peer-to-peer opponents must have matching files.
• Con: Corporate networks, cloud-gaming services, firewalls, and antivirus tools can prevent connections or require manual fixes.
• Con: Training features and input playback depend on game support rather than applying universally.

Alternatives

For a conventional emulator without Dojo's stated netplay emphasis, Flycast is free, ad-free, and supports Android, Linux, macOS, and Windows; you supply your own game files. The similarly named Flycast is also free across those platforms and covers Dreamcast, Naomi, Naomi 2, and Atomiswave emulation.

nullDC 2.0.0 is a free downloadable build for Linux, macOS, Windows, and the web. Pick MAME instead when you want a broad, GPL-licensed emulation project; ROMs and copyrighted software are generally not included. WashingtonDC is a free, open-source Dreamcast option for Linux and Windows. Redream offers Android, Linux, macOS, and Windows support with a free plan plus a one-time Premium payment of $6.00 (pay-what-you-want amounts of $6, $8, $10, and $20 are listed), so it suits readers willing to pay for its premium feature set. Deecy is a free Linux and Windows alternative. Nitrocast is a free Linux alternative.

For broader comparisons, see the Dreamcast Emulators and Game Console Emulators lists.

Verdict

Flycast Dojo is the right choice for retro players and organizers who value relay-assisted netplay, replay review, spectating, and structured training in one free emulator. Choose it when those multiplayer and practice tools matter; look elsewhere if you want a minimal emulator experience or cannot ensure matching files and a network compatible with its connection methods.