Phaethon

Changelog

What each release changed, for the runtime and for the launcher, straight from the files that ship with them.

The runtime

Every release, in the launcher's own words.

read from the store's changelog.md · fetched 27 Sep 2026 · the same file the launcher shows after an update

v0.1.0-rc5

2026-09-26

Launcher

  • An import that fails while building the game now stops with its own error instead of crashing.

v0.1.0-rc4

2026-09-25

Jak X

  • Jak X imports from its retail disc through the launcher.

Launcher

  • Importing a folder that holds a different game stops with a clear error.
  • The game's reports to the launcher no longer stall after one of them fails.
  • Only your own account can read what the game reports to the launcher.

Delivery

  • An update rebuilds only the games it changes.
  • Each release carries these notes, and the launcher shows them.

v0.1.0-rc3

2026-09-25

Launcher

  • Each game now tells the launcher what you are doing in it.

Games

  • Game loading follows the original console more closely in all four games.

v0.1.0-rc2

2026-09-24

Delivery

  • Nothing changed in the games; this candidate tested how releases are published.

v0.1.0-rc1

2026-09-24

Games

  • The first Phaethon release: Jak and Daxter, Jak II, Jak 3 and Jak X: Combat Racing as native ports true to the originals.
  • A remastered preset sits beside the original look and keeps its own settings.
  • A debug window can be opened at startup.
  • Every Windows release comes with DLSS and FSR upscaling built in.

Launcher

  • The launcher installs the runtime, which never includes anything from a game disc.

Delivery

  • Each release comes as a single download.
The launcher

Its own line of releases.

the launcher's own notes, from the store's launcher/changelog.md · fetched 27 Sep 2026 · signed builds from the store

v0.2.0-rc6

2026-09-26

Launcher

  • Sessions you play while signed in are reported to your Phaethon account, and to no other.
  • Your profile shows play time from Phaethon, or from this PC when Phaethon cannot be reached.
  • Your profile lists each game with its play time, last play and whether its saves are backed up.
  • Phaethon's addresses moved to playphaethon.com.

v0.2.0-rc5

2026-09-26

Install

  • The license in setup fills its box and adds terms for game data, updates, presence and warranty.
  • Setup's Back, Next and Cancel buttons are evenly spaced.
  • The Launch Phaethon checkbox at the end of setup no longer touches its text.
  • The uninstaller looks like the setup wizard.
  • Setup shows the Phaethon icon in dark mode.

Launcher

  • Sign in to Phaethon from the launcher.
  • Your profile page shows your name, your email and your play time.
  • A runtime download that the store updates underneath starts over instead of leaving a mixed install.
  • The splash, About and crash reports show the full version, such as v0.2.0-rc4.
  • What's new appears after updating to a pre-release.
  • The launcher always uses Phaethon's server, and the Server setting is gone.
  • The changelog is wider and shows each change as a short summary.
  • The changelog describes each change in one short sentence.
  • An import error message uses American spelling.
  • A game build that fails while compiling now says so plainly.
  • The Home page shows what you are playing while a game runs, and the library waits for it to end.
  • Setup is Phaethon's: where it lives, your preferences, your account.
  • Discord presence can be turned off in Settings.

v0.2.0-rc4

2026-09-26

Launcher

  • Discord shows what you are doing in the launcher and in the game.
  • A runtime update rebuilds only the games it changes.
  • Two disc import errors now say what to do.
  • Runtime downloads are recorded in the launcher log.
  • The changelog has a tab for the launcher and one for the runtime.
  • The Runtime updated toast opens what changed.
  • The What's new card lists each change on one line.

Install

  • A setup wizard installs the launcher.
  • Setup says whether it installs, updates, reinstalls or downgrades.
  • Setup and uninstall wait until the launcher is closed.
  • Apps and Features lists the launcher once, and uninstalling asks what else to remove.
  • Setup and its uninstaller are signed whenever the launcher is.

Delivery

  • A busy server makes a runtime download wait and try again instead of failing.
  • The setup wizard can be downloaded from Phaethon's server.

v0.2.0-rc3

2026-09-25

Launcher

  • The Game page shows what you are doing while a game runs.
  • Each game keeps its play time and a summary of its last session.
  • Discord support for games and downloads is in place, switched on in rc4.
  • When a game closes, a toast says how long you played and where you stopped.
  • Settings from earlier versions keep their play time.

v0.2.0-rc2

2026-09-25

Launcher

  • The launcher is now called Phaethon.
  • Your settings move over with the rename.
  • A pre-release now updates to the next pre-release.

Install

  • The launcher installs for your Windows account and updates itself.
  • The launcher and its installer are ready to be signed.

v0.2.0-rc1

2026-09-24

Game

  • The Remastered checkbox starts the game on its remastered settings.
  • Settings saved with the old Enhanced preset open as Remastered.

Delivery

  • Each version is published as a download.
  • Installed launchers are offered only versions checked on the server.

v0.1.0

2026-09-02

Launcher

  • The first release of the Jak launcher.
  • It runs beside the launcher it came from without sharing settings or logins.
  • It reaches no server until one is set.
  • A failed update check says so.
  • Its window, About panel, crash dialog and Discord status read Jak Launcher.
  • It has a placeholder icon and logo.
Phaethon

Built with AI in the loop. Phaethon uses AI assistance for speed and accuracy, and holds it to the same bar as every other contribution: every change is read, tested and checked against the console before it lands.

develop f183c49b CI green v0.2.0-rc6 26 Sep 2026