The largest of the three, and the last to return.
Jak 3 is the largest of the trilogy, about 836,000 lines of GOAL. OpenGOAL released it as a beta on April 1st, 2026, the third game it had brought back from the disc. Phaethon took it over that July with 1,014 of its 1,040 files holding code, every gap again inherited.
Most of the fork's work on it is small things the disc does and the port did not. The dust storm's density and the menu's backdrop now match the console, the title screen's clouds and sun come up the same on every boot, the sky's clouds read the game's own state, the PC music player holds the game's tracks where its list had been empty, and objects fade in at the disc's distances instead of popping in. Beside retail, as a remastered option that is off under the retail settings, the desert storm became a volume of dust that dims the sun.
- 01
The disc
The player's own copy. Its archives hold the game's compiled code and all of its art.
- 02
Decompiler
Reads that compiled code back into GOAL a person can read, type-check and change.
- 03
Compiler
A new GOAL compiler builds the source for a PC's processor instead of the console's.
- 04
Runtime
A kernel, a sound and file driver and a renderer stand in for the console's hardware.
- PS2Jak 3 ships, closing the trilogy.
- OpenGOALJak 3 is released on PC as a beta.
- PhaethonPhaethon starts from OpenGOAL's tree.
- PhaethonThe dust storm, the menu's backdrop and the title screen's sky match the console.
- PhaethonThe PC music player fills with the game's own tracks.
- PhaethonThe logic ticks at 60 a second at any frame rate, and 30 hand-written frame-rate patches are retired.
- PhaethonThe subtitles move onto the shared overlay.
- PhaethonObjects fade in at the disc's distances instead of popping in.